Registration No. ________

- --------------------------------------------------------------------------------


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM S-4 EF
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933

- --------------------------------------------------------------------------------


                          SPARTA UNION BANCSHARES, INC.
             (Exact name of registrant as specified in its Charter)

    WISCONSIN               Applied For                        6711
    (State of        (I.R.S. Employer I.D. No.)     (Primary Standard Industrial
  Incorporation)                                      Classification Code No.)

                               124 WEST OAK STREET
                             SPARTA, WISCONSIN 54656
                                 (608) 269-6737
          (Address and telephone number of principal executive offices)

- --------------------------------------------------------------------------------


     JOHN J. SUND, JR.                    JOHN E. KNIGHT
     124 West Oak Street                  Boardman, Suhr, Curry & Field
     Sparta, WI  54656                    One S. Pinckney Street, Suite 410
     (608) 269-6737                       Post Office Box 927
                                          Madison, WI  53701-0927
     (Name, address, telephone no.
     of agent for service)                (Copy of Notices)

- --------------------------------------------------------------------------------


     Approximate  date of commencement of proposed sale of the securities to the
public: upon consummation of the reorganization.

     If the  securities  being  registered  on this  Form are being  offered  in
connection  with the formation of a holding company and there is compliance with
General Instruction G, check the following box. [x]

     The registrant  hereby amends this  registration  statement on such date or
dates as may be necessary to delay its effective date until the registrant shall
file a further  amendment  which  specifically  states  that  this  registration
statement shall  thereafter  become effective in accordance with section 8(a) of
the  Securities  Act of 1933 or until the  registration  statement  shall become
effective on such date as the Commission  acting  pursuant to said section 8(a),
may determine.

- --------------------------------------------------------------------------------



                                          CALCULATION OF REGISTRATION FEE
                                                                                         

Title of each class                              Proposed maximum        Proposed maximum
of securities to be      Amount to be            offering price per      aggregate offering       Amount of
registered               registered              unit*                   price*                   registration fee
- -----------------        --------------          ------------------      -------------------      ----------------
Common Stock, no         3,869                   $2,122.00               $8,210,018.00            $2,487.88
par value

<FN>
*Based on the book  value of the  common  stock of Union  National  Bank & Trust Company on June 30,  1997,  estimated  solely for  
purposes of  calculating  the registration fee pursuant to Rule 457(f)(2).
</FN>


                          SPARTA UNION BANCSHARES, INC.

                              Cross Reference Sheet

Form S-4, Part I
   Item Number            Location in Prospectus

         1                FACING PAGE OF REGISTRATION STATEMENT; OUTSIDE FRONT
                          COVER PAGE OF PROSPECTUS

         2                TABLE OF CONTENTS

         3                SUMMARY

         4                SUMMARY; THE REORGANIZATION; COMPARISON OF BANK
                          STOCK WITH HOLDING COMPANY STOCK

         5                Not applicable

         6                SPARTA UNION BANCSHARES, INC.; UNION NATIONAL BANK
                          & TRUST COMPANY

         7                Not applicable

         8                THE REORGANIZATION

         9                SPARTA UNION BANCSHARES, INC.; UNION NATIONAL BANK
                          & TRUST COMPANY

         10               Not applicable

         11               Not applicable

         12               Not applicable

         13               Not applicable

         14               SPARTA UNION BANCSHARES, INC.; COMPARISON OF BANK
                          STOCK WITH HOLDING COMPANY STOCK

         15               Not applicable

         16               Not applicable

         17               UNION NATIONAL BANK & TRUST COMPANY; COMPARISON OF
                          BANK STOCK WITH HOLDING COMPANY STOCK

         18               THE REORGANIZATION; SPARTA UNION BANCSHARES, INC.;
                          UNION NATIONAL BANK & TRUST COMPANY; RIGHTS OF
                          DISSENTING STOCKHOLDERS OF BANK

         19               Not applicable



                              ______________, 1997



To the Shareholders of Union National Bank & Trust Company:

     Union National Bank & Trust Company ("Bank") will hold a special meeting of
its  shareholders on October 23, 1997, at 1:00 p.m., at the offices of the Bank,
124 West Oak Street, Sparta, Wisconsin.

     This meeting is of great importance to Bank shareholders,  because you will
again be asked to  consider  and  approve the  formation  of a one-bank  holding
company for the Bank. A bank holding company is a corporation  that owns most or
all of the stock of a bank. If a bank holding  company is approved for the Bank,
the Bank shareholders  would have their Bank stock exchanged for holding company
stock. The Bank shareholders would become the holding company shareholders,  and
the holding company would become the sole shareholder of the Bank. The formation
of a bank holding company would not involve any sale of the Bank.

     On September 26, 1996, the Bank shareholders  approved the formation of the
bank holding  company.  Because of regulatory  obstacles,  that  application was
withdrawn.

     More  than 150  one-bank  holding  companies  have been  formed  throughout
Wisconsin.  The Board of Directors  continues to believe that a holding  company
would be beneficial to the Bank and to its shareholders, because it would enable
the Bank to:

     1. Respond  rapidly and effectively to changes that may occur in the future
in the laws and regulations governing banks and bank-related activities;

     2. Be better able to acquire other banks, to be operated either as branches
of the Bank or as separate banks, in areas not now served by the Bank;

     3.  Offer  bank-related  services,  through  nonbanking  affiliates  to  be
acquired or created in the future,  to present Bank  customers and other members
of the public;

     4. Provide a potential market for the stock of the holding company;

     5. Meet any  future  capital  requirements,  that are not  provided  by the
future earnings of the Bank,  through borrowings by the holding company that are
repaid by nontaxable dividends from the Bank; and

     6. Compete more effectively with other bank holding companies.

     Another Bank  shareholder  meeting is  necessary  to have this  transaction
approved.







     If the holding  company is approved,  shareholders of the Bank will receive
one (1) share of holding company stock for each share of Bank stock.

     This  letter is  followed  by a formal  notice of the  special  meeting  of
shareholders and a  Prospectus/Proxy  Statement  ("Prospectus").  The Prospectus
serves  two  purposes.  First,  it is the  proxy  statement  of the  Bank  which
describes the proposed transaction and asks you to send in your Proxy to vote on
the holding company at the special meeting of  shareholders.  A form of Proxy is
enclosed  separately (on blue paper).  Second, it is a Prospectus of the holding
company which describes the holding company and its stock.

     The Board of Directors of the Bank unanimously  recommends  approval of the
holding  company  formation.  All of the Bank's  Directors have indicated  their
intention to vote in favor of the holding company.  The Board of Directors urges
you to read the enclosed Prospectus carefully, and hopes that you choose to join
them in approving the holding company formation.

     Please return the enclosed Proxy to ensure that your shares are represented
in the voting on this transaction.  IN ORDER TO APPROVE THE HOLDING COMPANY, THE
AFFIRMATIVE VOTE OF TWO-THIRDS  (66.67%) OF ALL OF THE OUTSTANDING SHARES OF THE
BANK WILL BE NEEDED.  YOUR VOTE IS IMPORTANT  REGARDLESS  OF HOW MANY SHARES YOU
OWN. PLEASE SIGN AND RETURN THE PROXY PROMPTLY IN THE ENCLOSED ENVELOPE, EVEN IF
YOU PLAN TO ATTEND THE MEETING.  If you do attend the  meeting,  you may at that
time revoke your proxy and vote your shares in person at the meeting.

     The  Directors  believe  that the  formation  of a  holding  company  is an
important  step forward for the Bank.  If you have  questions  about the holding
company or the Prospectus, please call me at (608) 269-6737.

                                   Very truly yours,



                                   John J. Sund, Jr., President


                       UNION NATIONAL BANK & TRUST COMPANY

                               124 West Oak Street
                             Sparta, Wisconsin 54656

                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                           TO BE HELD OCTOBER 23, 1997


     A special  meeting of  shareholders  of Union National Bank & Trust Company
(the  "Bank"),  will be held on  Thursday,  October  23,  1997,  at 124 West Oak
Street,  Sparta,  Wisconsin  at 1:00  p.m.,  Central  Time,  for  the  following
purposes:

     1. To vote on the following resolution:

          RESOLVED,  that the  formation  of a bank  holding  company  for Union
          National Bank & Trust Company, pursuant to the terms and conditions of
          an Agreement and Plan of Reorganization  between Union National Bank &
          Trust Company and Sparta Union Bancshares, Inc. and a Merger Agreement
          between Union  National  Bank & Trust  Company and New Union  National
          Bank & Trust Company  whereby (i) Union  National Bank & Trust Company
          will become a  wholly-owned  subsidiary  of Sparta  Union  Bancshares,
          Inc.,  and (ii)  shareholders  of Union  National Bank & Trust Company
          will become  shareholders of Sparta Union Bancshares,  Inc., is hereby
          authorized and approved.

     2. To transact such other  business as may properly come before the meeting
or any adjournments thereof.

     At this meeting, holders of record of common stock of the Bank at the close
of business on October 1, 1997 will be entitled to vote.  Two-thirds (66.67%) of
the  issued  and  outstanding  shares  of the Bank must be voted in favor of the
above resolution in order to permit the holding company formation to proceed.

     Shareholders  and beneficial  shareholders are or may be entitled to assert
dissenters' rights under Subsections  215a(b),  (c) and (d) of the United States
Code.   A  copy  of  those   sections  is  attached  to  the   following   Proxy
Statement/Prospectus as Exhibit C.

     THE BOARD OF  DIRECTORS  OF THE BANK  BELIEVES  THAT THE  PROPOSED  HOLDING
COMPANY  IS IN  THE  BEST  INTERESTS  OF  THE  BANK  AND  ITS  SHAREHOLDERS  AND
UNANIMOUSLY  RECOMMENDS  THAT  SHAREHOLDERS  OF THE BANK VOTE "FOR" THE PROPOSED
HOLDING COMPANY.

                                             By Order of the Board of Directors

                                             Karl Wall, Secretary

_______________, 1997


                                 PROXY STATEMENT
                                       OF
                       UNION NATIONAL BANK & TRUST COMPANY

                                       AND

                                   PROSPECTUS
                                       OF
                          SPARTA UNION BANCSHARES, INC.

             Special Meeting of Union National Bank & Trust Company
                    Shareholders to be held October 23, 1997

     This  Proxy  Statement  is being  furnished  to the  shareholders  of Union
National Bank & Trust Company,  Sparta,  Wisconsin ("Bank"),  in connection with
the solicitation of proxies by the Board of Directors of the Bank for use at the
special meeting of shareholders to be held on October 23, 1997. At that meeting,
the  shareholders  of Bank  will  again  consider  and vote  upon  the  proposed
acquisition of the Bank by Sparta Union Bancshares,  Inc. ("Holding Company") by
means of a reorganization.

     On September 26, 1996, the Bank's shareholders  approved the formation of a
one-bank  holding  company  for the Bank.  Because  of the Bank's  inability  to
satisfy  regulatory  concerns,  the Bank withdrew its  application.  Because the
Bank's Board of Directors  continues to believe that a bank holding company will
benefit  the Bank,  the Board has  decided  to go ahead  with  plans to form the
one-bank holding company.  To do so, however,  requires that the matter again be
submitted to the Bank's shareholders.

     Under its Articles of Incorporation,  the Holding Company will have a right
of first  refusal to purchase  shares of its stock at the price and on the terms
and  conditions  offered to any Holding  Company  shareholder  by a  prospective
purchaser.  Such a limitation does not currently exist on the stock of the Bank.
The right of first refusal will apply to Holding  Company shares in the hands of
all shareholders,  including  subsequent  transferees.  Certificates  evidencing
shares of Holding Company stock will bear a legend describing the right of first
refusal.  The  Holding  Company's  right to purchase  may limit a  shareholder's
ability to sell shares to other  purchasers.  The right of first  refusal  might
also limit the formation of a market for the stock outside the Holding  Company.
See  "COMPARISON  OF BANK  STOCK  WITH  HOLDING  COMPANY  STOCK - Market for the
Stock."

                  --------------------------------------------

     Sparta Union  Bancshares,  Inc. has filed a Registration  Statement on Form
S-4 pursuant to the Securities  Act of 1933, as amended,  covering the shares of
Sparta Union  Bancshares,  Inc. common stock to be issued in connection with the
reorganization.  These  materials  constitute  the  Prospectus  of Sparta  Union
Bancshares, Inc. to the shareholders of Union National Bank & Trust Company.


     THIS  PROSPECTUS  DOES NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF
AN OFFER TO PURCHASE THE SECURITIES OFFERED HEREBY IN ANY JURISDICTION WHERE, OR
TO OR FROM ANY PERSON TO WHOM, IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION
OF ANY OFFER.  IN THOSE  JURISDICTIONS  THE SECURITIES OR BLUE SKY LAWS OF WHICH
REQUIRE THIS OFFER TO BE MADE BY A LICENSED BROKER OR DEALER,  THIS OFFER MAY BE
MADE ON BEHALF OF SPARTA UNION  BANCSHARES,  INC. ONLY BY REGISTERED  BROKERS OR
DEALERS WHO ARE LICENSED UNDER THE LAWS OF SUCH JURISDICTIONS.

     NO PERSON IS AUTHORIZED TO GIVE ANY INFORMATION OR MAKE ANY  REPRESENTATION
NOT  CONTAINED IN THIS  PROSPECTUS  AND, IF GIVEN OR MADE,  THE  INFORMATION  OR
REPRESENTATION SHOULD NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED.  NEITHER THE
DELIVERY OF THIS PROSPECTUS NOR ANY DISTRIBUTION OF THE SECURITIES TO WHICH THIS
PROSPECTUS RELATES SHALL,  UNDER ANY CIRCUMSTANCES,  CREATE ANY IMPLICATION THAT
THERE HAS BEEN NO CHANGE IN THE  AFFAIRS OF SPARTA  UNION  BANCSHARES,  INC.  OR
UNION  NATIONAL BANK & TRUST COMPANY SINCE THE DATE OF THIS  PROSPECTUS.  SPARTA
UNION  BANCSHARES,  INC. IS REQUIRED TO ADVISE  SHAREHOLDERS  OF ANY FUNDAMENTAL
CHANGE  AFFECTING THE TERMS OF THE  TRANSACTION  BETWEEN  UNION  NATIONAL BANK &
TRUST COMPANY AND SPARTA UNION BANCSHARES, INC.

     THE SECURITIES  BEING OFFERED ARE NOT SAVINGS  ACCOUNTS OR DEPOSITS AND ARE
NOT INSURED BY THE FEDERAL DEPOSIT INSURANCE CORPORATION OR ANY OTHER GOVERNMENT
AGENCY.

     THIS  PROSPECTUS DOES NOT COVER ANY RESALE OF THE SECURITIES TO BE RECEIVED
BY SHAREHOLDERS OF UNION NATIONAL BANK & TRUST COMPANY UPON  CONSUMMATION OF THE
REORGANIZATION AND NO PERSON IS AUTHORIZED TO MAKE ANY USE OF THIS PROSPECTUS IN
CONNECTION WITH ANY SUCH RESALE.

                   ------------------------------------------

     THE SHARES OF SPARTA UNION  BANCSHARES,  INC.  COMMON STOCK TO BE ISSUED IN
THE  REORGANIZATION  HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
EXCHANGE  COMMISSION NOR HAS THE COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY
OF THIS PROXY STATEMENT/  PROSPECTUS.  ANY  REPRESENTATION  TO THE CONTRARY IS A
CRIMINAL OFFENSE.

                  --------------------------------------------

     The date of this Proxy Statement/Prospectus is ___________, 1997.


                                TABLE OF CONTENTS

                                                                            Page

SUMMARY                                                                      i

INTRODUCTION                                                                 1

THE REORGANIZATION                                                           2

    General                                                                  2
    Reasons for the Reorganization                                           2
    Summary of the Reorganization                                            4
    Special Meeting of Shareholders                                          5
    Operation of the Bank Following the Reorganization                       6
    Conditions Precedent to the Reorganization                               6
    Closing Date                                                             7
    Affiliates                                                               8
    Tax Considerations                                                       8
    Securities Regulation                                                   12
    Resale of Holding Company Common Stock                                  13
    Expenses of Reorganization                                              13

RIGHTS OF DISSENTING STOCKHOLDERS OF BANK                                   13

SPARTA UNION BANCSHARES, INC.                                               14

    History, Business, and Properties                                       14
    Management                                                              15
    Principal Shareholders                                                  15
    Description of Holding Company's Common Stock                           16
    Executive Compensation                                                  16
    Transactions with Related Parties                                       16
    Certain Anti-Takeover and Indemnification Provisions                    16

UNION NATIONAL BANK & TRUST COMPANY                                         18

    History, Business, and Properties                                       18
    Management                                                              19
    Business Background of Directors and Executive Officers                 20
    Executive Compensation                                                  21
    Director Compensation                                                   22
    Board Review of Management Compensation                                 22


    Principal Shareholders                                                  22
    Description of the Stock of the Bank                                    22
    Transactions with Related Parties                                       23
    Indemnification of Directors and Officers                               23
    Shares of the Stock Owned or Controlled by Management                   24
    Recommendation of the Bank's Board of Directors                         24

FINANCIAL INFORMATION                                                       24

COMPARISON OF BANK STOCK WITH HOLDING COMPANY STOCK                         25

    Authorized Shares and Par Value                                         25
    Voting Rights                                                           25
    Dividends                                                               26
    Market for the Stock                                                    27
    Value                                                                   30
    Other                                                                   31

SUPERVISION AND REGULATION                                                  32

    General                                                                 32
    Banking Regulation                                                      32
    Capital Requirements for Holding Company and Bank                       33
    Liquidity Requirements for Holding Company and Bank                     34
    FDIC Insurance Premiums                                                 35
    Loan Limits to Borrowers                                                35
    Recent Regulatory Developments                                          35

AVAILABLE INFORMATION                                                       36

LEGAL MATTERS                                                               37

EXHIBIT A - Agreement and Plan of Reorganization

EXHIBIT B - Tax Opinion of Boardman, Suhr, Curry & Field

EXHIBIT C - United States Code Sections

EXHIBIT D - Articles of Incorporation of Sparta Union Bancshares, Inc.



                                     SUMMARY

     The following is a summary of certain  information  contained  elsewhere in
this  Prospectus/Proxy  Statement.  This summary is  necessarily  incomplete and
selective,  and is qualified  in its entirety by reference to the more  detailed
information contained elsewhere in this Prospectus/Proxy Statement. Shareholders
are urged to review carefully the entire  Prospectus/Proxy  Statement  including
the Exhibits.

     Parties               Sparta Union Bancshares, Inc. ("Holding Company")
                           124 West Oak Street
                           Sparta, Wisconsin  54656
                           (608) 269-6737

                           Union National Bank & Trust Company ("Bank")
                           124 West Oak Street
                           Sparta, Wisconsin  54656
                           (608) 269-6737

     The Holding Company, a Wisconsin corporation,  was organized at the request
of the  management  of the Bank for the purpose of  becoming a one-bank  holding
company for the Bank.  The Holding  Company is currently  in the  organizational
stage and has no  operating  history.  See  "SPARTA  UNION  BANCSHARES,  INC.  -
History,  Business,  and  Properties."  The  Bank  is a  bank  chartered  by the
Comptroller  of the  Currency and has been  operating  as a  commercial  bank in
Sparta,  Wisconsin since 1969. The Bank offers comprehensive banking services to
the residential,  commercial,  industrial and agricultural areas that it serves.
Such services include agricultural,  commercial, real estate and personal loans;
checking,  savings and time deposits; and other customer services,  such as safe
deposit  facilities.  See  "UNION  NATIONAL  BANK &  TRUST  COMPANY  -  History,
Business, and Properties."

The Reorganization

     The Board of Directors of the Bank proposes to form a bank holding  company
for the Bank. The Holding Company will acquire all the outstanding shares of the
Bank  through  a   reorganization   ("Reorganization").   As  a  result  of  the
Reorganization,   the  Holding   Company  will  be  owned  by  the  former  Bank
shareholders  and the Bank will become a wholly-owned  subsidiary of the Holding
Company. For more information about the Reorganization,  see "THE REORGANIZATION
- - Summary of the  Reorganization"  and the Agreement and Plan of  Reorganization
attached as Exhibit A.



                                       (i)



Special Meeting of Shareholders

     A special  meeting of the  shareholders of the Bank will be held on October
23, 1997, at 1:00 p.m., Central Time, at 124 West Oak Street, Sparta, Wisconsin.
The purpose of the meeting is to consider and vote upon the  formation of a bank
holding company pursuant to the Agreement and Plan of Reorganization attached as
Exhibit A. Shareholders of record as of the close of business on October 1, 1997
will be entitled to vote at the meeting.  The affirmative vote of the holders of
two-thirds  (66.67%) of the  outstanding  Bank stock will be required to approve
the  transaction.  Directors and executive  officers of the Bank own or control,
directly or indirectly,  approximately  12.3% of the outstanding Bank stock. See
"THE REORGANIZATION - Special Meeting of Shareholders."

Recommendation of the Bank's Board of Directors

     The  Board  of   Directors   of  the  Bank   believes   that  the  proposed
Reorganization  will  benefit  the  Bank  and is in the  best  interests  of its
shareholders. Accordingly, the Board recommends that its shareholders vote their
Bank shares to approve the Reorganization. See "THE REORGANIZATION - Reasons for
the Reorganization" and "UNION NATIONAL BANK & TRUST COMPANY - Recommendation of
the Bank's Board of Directors."

Effect on Bank Shareholders

     Subject to certain limitations and appraisal rights provided by law, on the
effective date of the Reorganization each outstanding share of Bank common stock
outstanding  immediately  prior to the effective  date will be exchanged for one
share of  Holding  Company  stock,  and the Bank  shareholders  will  become the
shareholders of the Holding Company.

Dissenters' Rights

     Under certain  provisions of the United States Code,  holders of Bank stock
have the right to object to the  Reorganization  and demand  payment of the fair
value of their shares in cash if they (i) either vote against the reorganization
at the special meeting of the shareholders or give written notice to the Holding
Company  of their  intent to demand  payment  for their  shares at or before the
shareholder  meeting,  (ii) demand  payment in writing before the date stated in
the dissenters' notice, (iii) surrender their Bank stock certificates,  and (iv)
take certain other actions. See "RIGHTS OF DISSENTING STOCKHOLDERS OF BANK."



                                      (ii)



Federal Income Tax Consequences

     The  Reorganization has been structured with the intent that it qualify for
federal income tax purposes as a tax-free  transaction,  so that shareholders of
the Bank will  recognize no gain or loss on the exchange of their Bank stock for
Holding  Company  stock.  Exhibit B to this  Prospectus is an opinion of counsel
that the Reorganization is a tax-free  transaction.  The opinion of counsel will
not be binding on the Internal  Revenue Service.  See "THE  REORGANIZATION - Tax
Considerations."

Date of the Reorganization

     The Reorganization will take place as promptly as practicable after receipt
of  all  necessary  approvals  of  governmental  agencies  and  authorities  and
satisfaction of certain other terms and conditions.  See "THE  REORGANIZATION  -
Closing Date."

Conditions for the Reorganization

     The  Reorganization  is  conditioned  upon  approval  by the  Office of the
Comptroller of the Currency,  the Federal Reserve Board and at least  two-thirds
(66.67%)  of the  outstanding  stock of the  Bank,  and  upon  other  terms  and
conditions.   See   "THE   REORGANIZATION   -   Conditions   Precedent   to  the
Reorganization."  The Holding  Company  and the Bank may amend,  modify or waive
certain  conditions if, in the opinion of the Boards of Directors of the Holding
Company and the Bank, the action would not have a material adverse effect on the
benefits intended for holders of Holding Company stock.

Right of First Refusal

     The Articles of  Incorporation  of the Holding  Company contain a provision
giving the Holding  Company a right of first  refusal to purchase  shares of its
stock at a price and on the terms and  conditions  offered to a shareholder by a
prospective purchaser.  Transactions within a shareholder's immediate family and
certain other stock  transactions are permitted.  The right of first refusal may
limit a  shareholder's  ability  to sell  shares to  purchasers  other  than the
Holding  Company.  In  addition,  the  right of first  refusal  may  reduce  the
likelihood of another buyer obtaining control of the Holding Company through the
acquisition  of large blocks of Holding  Company stock.  The Bank's  Articles of
Incorporation  do not contain a comparable  limitation.  See "COMPARISON OF BANK
STOCK WITH HOLDING COMPANY STOCK - Market for the Stock."




                                      (iii)



                   ------------------------------------------
                                 PROXY STATEMENT
                                       AND
                                   PROSPECTUS
                   ------------------------------------------


                                  INTRODUCTION


     Sparta Union Bancshares, Inc. ("Holding Company") is a business corporation
organized at the request of the  management  of the Union  National Bank & Trust
Company  ("Bank")  for the  purpose of the  reorganization.  See  "SPARTA  UNION
BANCSHARES,  INC."  The Bank is a  national  banking  association  that has been
operating  as a  commercial  bank in Sparta,  Wisconsin  since 1969.  See "UNION
NATIONAL BANK & TRUST COMPANY".

     The  reorganization is being conducted for the purpose of forming a holding
company  for the Bank,  according  to a plan of  reorganization  approved by the
Board of Directors  of the Holding  Company and by the Board of Directors of the
Bank. See "THE  REORGANIZATION  - Summary of the  Reorganization."  The Board of
Directors of the Bank believes that the formation of a bank holding company will
benefit the Bank and its shareholders. See "THE REORGANIZATION - Reasons for the
Reorganization" and "UNION NATIONAL BANK & TRUST COMPANY - Recommendation of the
Bank's Board of Directors."

     This Prospectus contains information intended to help each Bank shareholder
decide whether to vote to approve the formation of a bank holding company.  See,
for example, "COMPARISON OF BANK STOCK WITH HOLDING COMPANY STOCK." The Board of
Directors of the Holding  Company urges each Bank  shareholder to carefully read
the entire Prospectus.





                               THE REORGANIZATION


General

     The  reorganization is designed to offer shareholders of the Union National
Bank & Trust Company  ("Bank") the  opportunity to form a bank holding  company.
Pursuant to the reorganization, the following steps have already occurred:

     1.   Sparta  Union  Bancshares,   Inc.  ("Holding  Company"),  a  Wisconsin
          business  corporation,  has  been  incorporated  for  the  purpose  of
          participating  in the  reorganization  and  becoming  a  bank  holding
          company.

     2.   The Board of  Directors  of the Bank and the Board of Directors of the
          Holding  Company have  adopted and  approved an Agreement  and Plan of
          Reorganization.

     The following steps,  among others,  remain to be completed pursuant to the
reorganization   (See  "THE   REORGANIZATION  -  Conditions   Precedent  to  the
Reorganization"):

     1.   The  shareholders of the Bank must approve the  reorganization  by the
          affirmative vote of two-thirds (66.67%) of the outstanding Bank stock.

     2.   The  Federal   Reserve  Board  must  approve  the  Holding   Company's
          application  to become a bank holding  company  under the Bank Holding
          Company Act of 1956.

     3.   The Comptroller of the Currency must approve the reorganization.

Reasons for the Reorganization

     The Board of Directors of the Bank recommends the reorganization because it
believes  that a bank holding  company will offer  opportunities  to the Bank to
compete more  effectively and to expand its services in type, in number,  and in
geographical  scope.  In addition,  the Board  believes  that the formation of a
holding company will provide benefits to the shareholders and to its community.

     Flexibility. The proposed reorganization will, in the opinion of the Board,
better  prepare  the Bank for  responding  flexibly  and  efficiently  to future
changes in the laws and regulations governing banks and bank-related activities.
Often,  opportunities arise for bank holding companies that are not available to
banks,  and vice versa. The bank holding company  corporate  structure may prove
valuable  in  taking   advantage  of  any  new   opportunities  in  banking  and
bank-related fields that are made available by deregulation or otherwise.



                                        2




     Market for the Stock. Under federal law, a national bank is prohibited from
purchasing its own stock,  except in certain limited  circumstances.  Therefore,
any Bank  shareholder  who desires to sell his or her Bank stock must  generally
locate a person  willing to purchase  the stock.  In the past,  there has been a
limited market for Bank stock, making it difficult for a seller to find a buyer,
particularly  if the seller owns a large  number of shares that would  require a
substantial purchase price.

     The Holding Company will not be prohibited by law from  purchasing  Holding
Company stock,  unless such a purchase would make the Holding Company insolvent.
Therefore,  the Holding Company may become a potential buyer of that stock,  and
may create a market that presently does not exist.  The Holding Company will not
be required to purchase  stock,  but may do so in the discretion of its Board of
Directors.  In certain circumstances,  approval by the Federal Reserve Board may
be required  for the purchase of Holding  Company  stock.  For more  information
about the Holding  Company's  ability to purchase stock, see "COMPARISON OF BANK
STOCK WITH HOLDING COMPANY STOCK - Market for the Stock."

     Expansion.  The principal means for a bank to seek continued growth,  apart
from utilizing more fully the business potential within its present market area,
is by use of the  holding  company  structure  to reach  into  other  geographic
markets. After the reorganization, the Holding Company will be able to, and may,
subject  to  approval  of  regulatory  authorities,  create new banks or acquire
existing banks anywhere in Wisconsin and neighboring states. The Holding Company
has no present plans to acquire any such banks.

     Diversification.  The proposed bank holding  company  offers the ability to
diversify the business of the Bank by creating or acquiring corporations engaged
in bank-related  activities.  Diversification  into  bank-related  activities is
governed by the Bank Holding  Company Act of 1956,  and the  regulations  of the
Federal Reserve Board promulgated  pursuant to that Act. The range of activities
in which the Holding Company may engage through nonbank  subsidiaries  includes,
subject to  approval of the  Federal  Reserve  Board,  loan  service  companies,
mortgage  companies,  independent  trust  companies,  small  loan and  factoring
companies,  equipment leasing  companies,  credit life and disability  insurance
companies,  and certain  insurance,  advisory,  and  brokerage  operations.  The
Holding Company may in the future engage directly or through subsidiaries in one
or more of those activities.  However, the timing and extent of those operations
by the Holding  Company will depend on many factors,  including  competitive and
financial  conditions  existing  in the  future  as well as the  then  financial
condition of the Holding Company and the Bank.

     Capital Requirements. The proposed reorganization will also provide, in the
opinion of the Board, greater flexibility in meeting financing needs of the Bank
or other banks or corporations acquired by the Holding Company. Currently, there
is no need for the Bank to obtain additional capital. If the need for additional
capital should arise,  however,  those capital requirements of the Bank could be
obtained through borrowings by the Holding Company,  which would then be paid to
the Bank by the Holding  Company as a capital  contribution  or as a purchase of
additional  Bank  stock.  The loan to the  Holding  Company  would be paid  with
dividends received from the Bank, which would not be taxable to the


                                        3



Holding Company if it holds at least 80% of the Bank stock. The interest expense
incurred  by the  Holding  Company  on the  loan  could be used to  offset  Bank
earnings on a consolidated federal income tax return.

     General.  The Board believes that greater  overall  strength will result to
the Bank through the  formation  of the Holding  Company.  The  formation of the
Holding  Company  is not  part of a plan  or  effort  to  adversely  affect  any
shareholder, or to unduly benefit any shareholder,  director, or officer. Except
for those  shareholders  who  exercise  dissenter's  rights,  the  proportionate
interests  of the  Bank  shareholders  in the  Holding  Company  stock  will  be
identical to their current proportionate interests in the Bank stock.

Summary of the Reorganization

     The Holding Company intends to acquire all of the outstanding  stock of the
Bank  through a  reorganization.  To perform  the  reorganization,  the  Holding
Company will  incorporate  a new bank,  called New Union  National  Bank & Trust
Company ("New Bank"), as a wholly-owned  subsidiary of the Holding Company.  The
New Bank will not conduct any banking  business or any other  business.  It will
have no employees,  no  liabilities,  no  operations,  and (except for a nominal
capital  contribution  required  by  law)  no  assets.  It  will  be  a  "shell"
corporation,  and will be incorporated  for the sole purpose of assisting in the
reorganization.

     To perform the  reorganization,  the Bank will be merged into the New Bank.
The stock of the Bank now held by the  shareholders  will be converted  into the
Holding  Company stock at the rate of one share of the Holding Company stock for
each one  share of Bank  stock  that they  currently  own.  Therefore,  the Bank
shareholders will become  shareholders of the Holding Company.  In addition,  by
virtue  of the  merger of the Bank  into the New  Bank,  the Bank will  become a
wholly-owned subsidiary of the Holding Company.

     Currently,  the Bank shareholders own 3,869 shares of the Bank's stock. The
remaining 231  authorized  shares are owned by the Bank as Treasury  Stock.  The
Holding  Company will purchase  those 231 shares of Treasury  Stock at their par
value. After the reorganization,  the Holding Company will own the Bank, and the
former Bank shareholders will own the Holding Company, as follows:



                                        4




      Current                                After Reorganization

Shareholders                                 Shareholders
- ------------                                 ------------
  3,869 shares (100%) of                      3,869 shares (100%) of
  outstanding Bank stock                      Holding Company stock

                                             Holding Company
                                             ---------------
                                              3,869 shares (100%) of
                                              outstanding Bank stock
Bank
- ----
                                             Bank
                                             ----


Special Meeting of Shareholders

     The  regulations of the  Comptroller of the Currency  require that at least
two-thirds of the outstanding  stock of a national bank approve a merger of that
bank. Because the  reorganization  will be conducted as a merger of the New Bank
and the Bank, that requirement must be fulfilled.

     A vote on the proposed holding company will be taken at the special meeting
of shareholders of the Bank, to be held on October 23, 1997, at 1:00 p.m., local
time, at the Bank, 124 West Oak Street, Sparta, Wisconsin. The close of business
on October 1, 1997, has been fixed as the record date for the  determination  of
shareholders  entitled  to  notice of and to vote at the  meeting.  On that date
there were  outstanding  and entitled to vote 3,869  shares of Bank stock.  Each
outstanding  share of Bank stock  entitles the record  holder to one vote on all
matters to be acted upon at the  meeting.  The presence at the meeting in person
or by proxy of the holders of a majority of the issued and outstanding shares of
Bank stock  entitled to vote will  constitute  a quorum for the  transaction  of
business.  The affirmative vote of 2,554 of the issued and outstanding shares of
Bank stock is required to approve the holding  company.  The Bank's  articles of
association  and by-laws as well as applicable  law do not appear to address the
issue of whether a vote for  abstention is treated as a "yes" vote or "no" vote.
Accordingly,  for  purposes of voting at this special  meeting of  shareholders,
abstentions are treated as "no" votes.

     THE BOARD OF DIRECTORS OF THE BANK  UNANIMOUSLY  RECOMMENDS THAT HOLDERS OF
BANK STOCK VOTE "FOR" THE TRANSACTION.  See "UNION NATIONAL BANK & TRUST COMPANY
- -  Recommendations  of the Bank's  Board of  Directors."  As of the date of this
Prospectus, the directors and executive officers of Bank owned or controlled 476
shares,  or 12.3% percent,  of the Bank stock  outstanding.  See "UNION NATIONAL
BANK & TRUST  COMPANY -  Management."  The  directors  and officers of Bank have
indicated  that they will vote to approve the  transaction,  and are  soliciting
proxies from Bank shareholders.


                                        5



     Each  shareholder  is  encouraged  to return  the  enclosed  Proxy (on blue
paper),  even if he or she intends to attend the meeting.  All properly executed
proxies  not  revoked  will be  voted  at the  meeting  in  accordance  with the
instructions  on the proxy.  Proxies  containing no  instructions  will be voted
"FOR" approval of the holding  company.  On any other matters  properly  brought
before  the  meeting  and  submitted  to a vote,  all  proxies  will be voted in
accordance with the judgment of the persons voting the proxies.  Any shareholder
executing and returning a proxy may revoke it by (1) submitting a later proxy to
Bank, (2) giving written notice to Bank, or (3) attending the meeting and voting
in person.  However,  the mere presence of a holder of Bank stock at the meeting
will not operate to revoke a proxy  previously  executed and  submitted,  unless
that  shareholder  indicates  at the  meeting  that  he or she  wishes  to  vote
directly.  Failure  to  submit  a proxy or to vote at the  meeting  has the same
effect  as a  negative  vote for  purposes  of  approving  or  disapproving  the
transaction.

     Federal law provides  appraisal rights to holders of Bank stock who dissent
from the merger, if statutory procedures are followed. See "RIGHTS OF DISSENTING
SHAREHOLDERS OF BANK."

Operation of the Bank Following the Reorganization

     The Holding Company  anticipates that,  following the  reorganization,  the
business of the Bank will be conducted  substantially  unchanged from the manner
in which it is now being  conducted.  The Bank's name will not be  changed.  The
Holding Company  anticipates that the Bank will be operated under  substantially
the same management,  and no changes in personnel are anticipated as a result of
the  reorganization.  After the  reorganization,  the Bank will  continue  to be
subject to regulation  and  supervision by regulatory  authorities,  to the same
extent as currently applicable.  See "SUPERVISION AND REGULATION." The Bank will
continue to prepare an annual  report in the same format as in prior years,  and
the Holding Company will send to all of its  shareholders a consolidated  annual
report,  in a similar  format as that used in the  Bank's  report.  The  Holding
Company will convene an annual  meeting of its  shareholders,  at a similar time
and for similar purposes as the Bank's annual meeting.

Conditions Precedent to the Reorganization

     The  Agreement  and Plan of  Reorganization  (Exhibit A) provides  that the
consummation of the  reorganization  is subject to certain  conditions that have
not yet been met, including, but not limited to, the following:

     1.   No investigation,  action,  suit or proceeding before any court or any
          governmental  or  regulatory  authority  shall have been  commenced or
          threatened  seeking to restrain,  prevent or change the reorganization
          or otherwise arising out of or concerning the reorganization.



                                        6



     2.   The application by the Holding Company to be a registered bank holding
          company  under  the Bank  Holding  Company  Act of 1956 must have been
          approved by the Federal Reserve Board.

     3.   The  Comptroller  of the  Currency  must  have  granted  all  required
          approvals for consummation of the reorganization.

     4.   The reorganization  must have been approved by shareholders  owning at
          least two- thirds of the outstanding Bank stock.

     5.   The Holding  Company and the Bank must have  received an opinion  from
          counsel  for the  Holding  Company and the Bank to the effect that the
          reorganization  will be a  tax-free  reorganization  (that  opinion is
          attached to this Prospectus as Exhibit B).

     6.   No change  shall  have  occurred  or be  threatened  in the  business,
          financial  condition or operations of the Bank, which, in the judgment
          of the Holding Company, is materially adverse.

     7.   No more than five percent (5%) of the Bank stock (193 shares or fewer)
          shall be "dissenting  shares"  pursuant to the exercise of dissenter's
          rights.

     8.   The  reorganization  must be  completed  by  March  31,  1998,  unless
          extended by the both the Bank and the Holding Company.

These  conditions are for the sole benefit of the Holding  Company and the Bank,
and may be asserted by them or may be waived or extended by them, in whole or in
part, at any time or from time to time. Any determination by the Holding Company
and the Bank concerning the events described above shall be final and binding.

     It is  anticipated  that  these  conditions  will be  met.  Any  waiver  or
extension of conditions not met will be conducted only if, in the opinion of the
Boards of  Directors of the Holding  Company and the Bank,  the action would not
have a material  adverse  effect on the  benefits  intended  for  holders of the
Holding  Company  stock  under the  reorganization.  The  reorganization  may be
terminated  and abandoned by the mutual consent of the Board of Directors of the
Holding  Company and the Board of Directors of the Bank at any time prior to the
closing date.

Closing Date

     The closing of the reorganization  shall take place on a date, the "Closing
Date," to be selected by the Holding  Company,  at the offices of the Bank,  124
West Oak Street,  Sparta,  Wisconsin;  provided,  however, that the Closing Date
shall be a date no later than  thirty (30) days after all  conditions  have been
met and all  approvals,  consents  and  authorizations  for the valid and lawful
consummation of the reorganization have been obtained.

                                        7




     On the  Closing  Date,  all of the  Bank  shareholders'  right,  title  and
interest in and to the shares of the Bank stock,  without any action on the part
of the shareholders,  shall  automatically  become and be converted into a right
only to receive the Holding  Company stock.  Commencing on the Closing Date, the
Holding  Company  shall  issue and  deliver  the  Holding  Company  stock to the
shareholders as set forth in the Agreement and Plan of  Reorganization  (Exhibit
A).

Affiliates

     The obligation of the Holding Company to consummate the  reorganization  is
subject to the  condition  that each person who is an  affiliate of the Bank for
purposes of Rule 145 of the  Securities  and  Exchange  Commission,  promulgated
under the Securities Act of 1933 (the "Securities Act"),  execute and deliver to
the Holding  Company a letter to the effect that,  among other things,  (i) such
person will not dispose of any shares of Holding Company stock to be received by
him or her pursuant to the  reorganization in violation of the Securities Act or
the rules and  regulations  thereunder,  and (ii) that  person  consents  to the
placing  of a legend  on the  certificates  representing  his or her  shares  of
Holding  Company stock  referring to the issuance of the shares in a transaction
to which Rule 145 is applicable and to the giving of stop-transfer  instructions
to the Holding  Company  transfer agent with respect to such  certificates.  The
Holding  Company  reserves the right to condition the exchange of its stock with
affiliates  on an  affiliate's  execution  and delivery of a letter  agreeing to
these terms.  Neither the Bank nor the Holding  Company will register the shares
of Holding Company stock for resale,  and any such registration  shall be at the
expense and instance of any shareholder desiring such registration.

     For the  purposes of this  transaction,  the Bank will treat as  affiliates
directors and executive  officers and any person who,  individually or through a
group,  controls,  is controlled by or is under common  control with, an entity.
Members  of a family  may be  regarded  as  members  of a group if, by acting in
concert,  they have the power to control the Bank.  Control will be evidenced by
ownership of 10% or more of the voting securities of the Bank.

     This  Prospectus may not be used by an affiliate of the Bank or the Holding
Company  for the  resale of  Holding  Company  stock  received  pursuant  to the
reorganization.

Tax Considerations

     Corporate  Income Tax. After the  reorganization,  the Holding Company will
own at least 80% of the  outstanding  stock of the Bank.  This will  permit  the
Holding Company to file a consolidated  federal income tax return with the Bank.
The filing of a consolidated federal income tax return will permit the deduction
of any interest  expense the Holding Company may incur as an expense against the
income of the Bank, and any dividend paid to the Holding  Company by the Bank on
the  shares of the Bank's capital stock held by the Holding Company would not be


                                        8




taxable as income to the Holding  Company.  In  addition,  the ability to file a
consolidated  federal  income tax return may increase the cash flow available to
the Holding  Company to meet its  obligations.  The State of Wisconsin  does not
permit consolidated income tax returns.

     The creation of the Holding Company  creates a separate  taxpayer under the
Internal Revenue Code. The Holding Company,  through its consolidated tax return
with the Bank and any other  subsidiaries  that may be formed or acquired in the
future,  will be  required  to pay  federal  and state  income  taxes on its net
income.  Immediately  after the formation of the Holding Company,  the principal
income to the Holding  Company will be dividends from the Bank.  Those dividends
will not be taxable income to the Holding Company as long as the Holding Company
holds at least 80% of the outstanding Bank stock. Therefore,  until such time as
the Holding Company  generates  substantial  income from sources other than Bank
dividends,  it is not  anticipated  that  it  will  incur  any  significant  tax
liability.

     As a separate taxpayer, the Holding Company may incur a separate tax on any
liquidation of the Holding Company or on an acquisition of the Holding Company's
assets by a third party.  Therefore,  a liquidation of the Holding  Company or a
sale of Bank stock by the Holding  Company could generate a double-level  tax, a
tax on the  Holding  Company and a tax on the Holding  Company  shareholders.  A
double-level  tax can be  avoided,  however,  if the third  party  acquires  the
Holding  Company stock for cash or acquires  Holding Company stock or Bank stock
in a tax-free reorganization.

     Individual Income Tax. The Holding Company has been advised by its counsel,
Board man,  Suhr,  Curry & Field,  Madison,  Wisconsin,  that as a result of the
transaction contemplated by the reorganization, for federal income tax purposes:
(i) no  gain  or  loss  will  be  recognized  to the  Bank  shareholders  on the
conversion of their shares of Bank stock into shares of Holding Company's common
stock; (ii) the income tax basis of the shares of Holding Company's common stock
in the  hands of the Bank  shareholders  will be the same as their  basis in the
shares of the Bank stock;  and (iii) the holding period of the shares of Holding
Company's  common stock in the hands of the Bank  shareholders  will include the
holding period of the shares of the Bank stock,  provided the shares of the Bank
stock constituted a capital asset as of the time of the  reorganization.  A copy
of that opinion is attached  hereto as Exhibit B (which  opinion  also  includes
matters pertaining to corporate tax consequences of the reorganization). Counsel
is also of the opinion that the same treatment  will apply for Wisconsin  income
tax purposes.

     The  opinion  is  based on the  following  representations  of the  Holding
Company and Bank:

     1.  The  fair  market  value  of  the  Holding   Company  stock  and  other
consideration  received by each Bank shareholder will be approximately  equal to
the fair market value of the Bank stock surrendered in the exchange.



                                        9



     2.  There  is no plan or  intention  by the Bank  shareholders  who own one
percent (1%) or more of the Bank stock,  and to the best of the knowledge of the
management  of the  Bank,  there  is no plan  or  intention  on the  part of the
remaining Bank shareholders to sell, exchange,  or otherwise dispose of a number
of shares of Holding Company stock received in the transaction that would reduce
the Bank shareholders'  ownership of Holding Company stock to a number of shares
having a value,  as of the date of the  transaction,  of less than fifty percent
(50%) of the value of all of the formerly  outstanding Bank stock as of the same
date.  For purposes of the  representation,  shares of Bank stock  exchanged for
cash or other property, surrendered by dissenters, or exchanged for cash in lieu
of fractional  shares of Holding  Company  stock will be treated as  outstanding
Bank stock on the date of the  transaction.  Moreover,  shares of Bank stock and
shares of Holding  Company stock held by Bank  shareholders  and otherwise sold,
redeemed  or  disposed  of  prior  or  subsequent  to the  transaction  will  be
considered in making this representation.

     3. New Union  National Bank & Trust Company ("New Bank"),  as the surviving
corporation, will acquire at least ninety percent (90%) of the fair market value
of the net assets and at least seventy percent (70%) of the fair market value of
the gross  assets held by the Bank  immediately  prior to the  transaction.  For
purposes of this representation, amounts paid by the Bank to dissenters, amounts
paid by the Bank to shareholders who receive cash or other property, Bank assets
used to pay its reorganization  expenses,  and all redemptions and distributions
(except  for  normal  dividends)  made by the  Bank  immediately  preceding  the
transfer  will be  included  as  assets  of the  Bank  immediately  prior to the
transaction.

     4. Prior to the transaction,  the Holding Company will be in control of the
New Bank within the meaning of I.R.C. sections 368(c).

     5. Following the transaction, the New Bank will not issue additional shares
of its stock that would result in the Holding  Company losing control of the New
Bank within the meaning of I.R.C. sections 368(c).

     6. The Holding  Company has no plan or intention  to  reacquire  any of its
stock issued in the transaction.

     7. The Holding  Company has no plan or intention to liquidate the New Bank,
to merge  the New Bank with and into  another  bank or  corporation,  to sell or
otherwise dispose of the stock of the New Bank, or to cause the New Bank to sell
or otherwise  dispose of any of the Bank's assets  acquired in the  transaction,
except for  dispositions  made in the  ordinary  course of business or transfers
described in I.R.C. sections 368(a)(2)(c).

     8. The  liabilities of the Bank assumed by the New Bank and the liabilities
to which the  transferred  assets of the Bank are subject,  were incurred in the
ordinary course of Bank's business.



                                       10



     9.  Following  the  transaction,  the New Bank will  continue  the historic
business of the Bank or use a significant portion of Bank's business assets in a
business.

     10. The Holding Company,  Bank, New Bank, and the Bank's  shareholders will
pay  their  respective  expenses,  if  any,  incurred  in  connection  with  the
transaction.

     11. There is no  intercorporate  indebtedness  existing between the Holding
Company  and the Bank or  between  the New Bank and the Bank  which was  issued,
acquired or will be settled at a discount.

     12. No two parties to the transaction  are investment  companies as defined
in I.R.C. sections 368(1)(2)(F)(iii) and (iv).

     13.  The  Bank is not  under  the  jurisdiction  of a court  in a Title  11
(bankruptcy) or similar case.

     14. The fair market value of the assets of the Bank  transferred to the New
Bank will  equal or exceed the sum of the  liabilities  assumed by the New Bank,
plus the liabilities, if any, to which the transferred assets are subject.

     15. No stock of New Bank will be issued in the transaction.

     Based on these representations, legal counsel is of the opinion that, under
current law,

          (1)  The proposed merger will constitute a  reorganization  within the
               meaning  of   sections   368(a)(1)(A)   by  reason  of   sections
               368(a)(2)(D)  of the Internal  Revenue Code of 1986,  as amended,
               and Chapter 71 of the Wisconsin Statutes. The reorganization will
               not be  disqualified  by reason of the fact that Holding  Company
               common stock is used in the transaction.  (Internal  Revenue Code
               Section 368(a)(2)(D).)

          (2)  No gain or loss will be recognized to the Bank on the transfer of
               substantially  all of its assets to the New Bank in exchange  for
               Holding  Company  common stock and the assumption by the New Bank
               of the liabilities of the Bank.

          (3)  No gain or loss will be recognized to the Holding  Company or the
               New Bank upon the receipt by the New Bank of substantially all of
               the assets of the Bank in exchange for the Holding Company common
               stock and the  assumption by the New Bank of the  liabilities  of
               the Bank.

          (4)  The basis of the Bank assets in the hands of the New Bank will be
               the same as the  basis of those  assets  in the hands of the Bank
               immediately prior to the proposed transaction.



                                       11



          (5)  The holding  period of the assets of the Bank in the hands of the
               New Bank will  include the period  during  which such assets were
               held by the Bank.

          (6)  The  basis of the New  Bank  stock  in the  hands of the  Holding
               Company  will be increased by an amount equal to the basis of the
               Bank assets acquired by the New Bank in the transaction, and will
               be decreased by the amount of  liabilities of the Bank assumed by
               the New Bank and the amount of  liabilities to which the acquired
               assets of the Bank are subject.

          (7)  No gain or loss will be  recognized  by the  shareholders  on the
               exchange of their Bank common  stock for Holding  Company  common
               stock;  provided,  however,  that no  opinion is  expressed  with
               respect to Bank shareholders who dissent from the transaction and
               receive cash for their Bank stock.

          (8)  The income tax basis of the Holding  Company  common  stock to be
               received by the shareholders will be the same as the basis of the
               Bank common stock surrendered in exchange.

          (9)  The holding  period of the  Holding  Company  common  stock to be
               received by the shareholders will include the period during which
               the Bank common stock surrendered in exchange was held,  provided
               that the Bank common stock is held as a capital asset on the date
               of the exchange.

     No tax rulings from the Internal  Revenue  Service have been obtained,  and
the  opinion of counsel  will not be binding on the  Internal  Revenue  Service.
Therefore, shareholders may find it advisable to consult their own counsel as to
the specific tax consequences to them under the federal tax laws, as well as any
consequences under applicable state or local tax laws.

     Shareholders  who  exercise  dissenter's  rights and receive cash for their
Bank stock should be aware that the  transaction  will be a taxable  transaction
for federal and state income tax purposes,  and those  shareholders are urged to
consult their tax advisors to determine the tax  consequences  to them under the
federal tax laws, as well as any consequence under applicable state or local tax
laws.  The  opinion of counsel  attached  as Exhibit B does not  pertain to cash
payments received pursuant to the reorganization.

Securities Regulation

     The offer to enter into this  Exchange  Offer is not being made to (nor can
it be accepted  from or on behalf of) holders of Bank stock in any  jurisdiction
in which  the  making  of the offer or the  acceptance  thereof  would not be in
compliance with the securities laws of such jurisdiction. The Holding Company is
not, and shall not be,  obligated to acquire any shares of Bank stock,  or issue
or deliver  any shares of its common  stock,  in any  jurisdiction  in which the
agreement to do so would not be in compliance  with the securities  laws of such



                                       12




jurisdiction.  However,  the Holding Company,  at its discretion,  may take such
action as it may deem necessary or desirable to comply with the securities  laws
of any such jurisdiction.

     This transaction may be registered in certain states, according to the laws
of those states. No securities commissioner,  securities department,  or similar
office of any state has approved or disapproved  the Holding Company stock to be
issued in the reorganization or has passed upon the accuracy or adequacy of this
Prospectus. Any representation to the contrary may be a criminal offense.

Resale of Holding Company Common Stock

     The Holding Company stock issued in the exchange has been registered  under
the  Securities  Act of 1933,  as  amended,  and may be traded by a  shareholder
subject to the Holding Company's right of first refusal. See "COMPARISON OF BANK
STOCK WITH HOLDING COMPANY STOCK - Market For the Stock."  Shareholders  who, at
the  Effective  Date,  are  "affiliates"  of the Bank and are  affiliates of the
Holding  Company at the time of the  proposed  resale are subject to  additional
restrictions on the resale of their shares. See "REORGANIZATION - Affiliates."

Expenses of Reorganization

     If the reorganization is consummated, the Holding Company and the Bank will
assume  and pay  their  respective  costs  and  expenses,  if any,  incurred  in
connection with the  reorganization.  If the  reorganization is not consummated,
all costs and  expenses  will be paid by the Bank.  It is  estimated  that those
costs and expenses will be approximately $15,000.

                  RIGHTS OF DISSENTING SHAREHOLDERS OF THE BANK

     Subsections 215a(b),  (c), and (d) of the United States Code, the full text
of which is attached hereto as Exhibit C, set forth the procedure to be followed
by any  shareholder  of Bank who wishes to dissent from the  reorganization  and
obtain  the value of his or her  shares of Bank stock in cash in lieu of Holding
Company  stock  pursuant to the  reorganization.  Shareholders  should  refer to
Exhibit C because the  following  description  does not purport to be a complete
summary of those subsections.

     In order to exercise such  dissenter's  rights, a Bank shareholder (1) must
either vote against the reorganization at the special meeting of shareholders or
give written  notice to an officer of the Bank at or before the special  meeting
of shareholders  that he or she dissents from the  reorganization,  and (2) must
make a written request to the Bank within 30 days after the  consummation of the
reorganization  to  receive  the value of his or her  shares,  and that  written
request  must  be  accompanied  by  the  surrender  of his  or  her  Bank  stock
certificates.  The written  request  should be addressed to: John J. Sund,  Jr.,



                                       13



President,  124 West  Oak  Street,  Sparta,  Wisconsin  54656.  The law does not
provide  for  a  dissent   with  respect  to  less  than  all  of  a  dissenting
shareholder's shares.

     After receipt by the Bank of a timely request for payment, the law provides
for an appraisal of the shares held by the dissenters. The value of those shares
is to be  determined  by a  committee  of three  persons,  one  selected  by the
dissenting  shareholders,  one selected by the  directors  of the Bank,  and the
third  selected  by the two so chosen.  The value  determined  by any two of the
three  appraisers  shall govern.  The expense of appraisal is to be borne by the
Bank.  If the value fixed by the committee is not  satisfactory  to a dissenting
shareholder he or she may,  within five days after being notified of such value,
appeal to the Comptroller,  who will then appoint an appraiser or appraisers for
reappraisal.  The value of a dissenting Bank shareholder's  shares as determined
by such appraisal, or reappraisal if such is performed, is final and binding and
will be paid by Bank as soon as practicable thereafter.

     If a Bank shareholder properly exercises dissenter's rights, then as of the
Effective  Date of the  reorganization,  all of the  Bank  stock  owned  by such
shareholder shall cease to represent any ownership rights in the Bank, and shall
be converted into the right to receive fair value for those shares,  as required
by law.


                          SPARTA UNION BANCSHARES, INC.

History, Business, and Properties

     The Holding Company was  incorporated as a Wisconsin  business  corporation
under the  Wisconsin  Business  Corporation  Law,  Chapter 180 of the  Wisconsin
Statutes,  in March,  1996, at the direction of the  management of the Bank. The
Holding  Company  was formed to acquire the Bank stock and to engage in business
as a bank holding company under the Bank Holding Company Act of 1956, as amended
(the "Act").  A true and correct copy of the  Articles of  Incorporation  of the
Holding Company is attached as Exhibit D. A copy of the Holding Company's Bylaws
will be provided to any Bank shareholder upon request.

     The Holding Company is in the organizational  and developmental  stage, and
has no earnings or history of operation.  The Holding  Company has no employees,
no current business, and owns no property,  except that the Holding Company will
own all of the stock of the New Bank immediately prior to the reorganization. It
has not issued any stock. It is not a party to any legal proceedings.

     The Holding Company has no present plans to engage in any activities  other
than as a  holding  company  for the  capital  stock of the  Bank.  The  Holding
Company's management,  how ever, believes that the opportunities  available to a
bank holding company for  diversification of its business and raising of capital
cause the bank holding company to be a more  advantageous form of operation than
a bank. The Holding Company may examine and may pursue  opportunities  from time


                                       14


to time that arise for  expansion of its  operations  and  activities.  See "THE
REORGANIZATION - Reasons for the Reorganization."

Management

     Development  and  management of the Holding  Company will be dependent upon
the efforts and skills of the following individuals,  who constitute the initial
executive officers and directors of the Holding Company:



Name and Age                     Position with           Principal            Shares of           Percentage
                                 Holding Company         Occupation           Holding
                                                                              Company (1)
                                                                                          
Eugene A. Arenz, 62              Director                Retail                  10                    .3%
Gary Edwards, 53                 Director                Insurance               10                    .3
Sherwin Giraud, 53               Director                Farming                 10                    .3
Donald L. Goodman, 71            Director                Retired                 20                    .5
J. David Rice, 51                Director                Attorney                68                   1.8
John J. Sund, Jr., 60            Director/President      Banking                130                   3.4
Karl Wall, 43                    Secretary               Banking                208                   5.4

TOTALS                                                                          456                  11.8%

<FN>
(1)  Represents  the  aggregate  number of shares which would be owned of record individually  and  jointly,  or by a spouse  or  
children  residing  at the same address,  and the shares which any such person controls the right to vote, after the reorganization.
The beneficial owners are listed on page 19, footnote 1. 
</FN>


     Each of the  directors  and  executive  officers  named  has  had the  same
principal  occupation  or  employment  for  the  past  five  years.  Each of the
directors and executive  officers named has served in the capacity  listed above
since the  incorporation  of the  Holding  Company in March,  1996.  The term of
office for each of the directors and executive officers named above is one year.
Please refer to page 20 of this  Prospectus  for a  description  of the business
background of the directors and executive officers named above.

Principal Shareholders

     After the  reorganization,  the persons  beneficially  owning 5% or more of
Holding  Company  common stock will be the same persons who  currently own 5% or
more  of  the  Bank  Stock.  See  "UNION  NATIONAL  BANK  &  TRUST  -  Principal
Shareholders."



                                       15



Description of Holding Company's Common Stock

     The Holding  Company's  authorized  capital stock consists of 9,000 shares,
all of one class,  designated as common stock,  none of which shares,  as of the
date  hereof,  is issued or out  standing.  The maximum  number of shares of the
Holding  Company's  common  stock  which  will be issued to the  holders of Bank
stock,  upon the terms and subject to the conditions of the  reorganization,  is
3,869 shares. The Holding Company currently has no plans to sell, distribute, or
otherwise issue the remaining 5,131 shares of authorized but unissued stock. The
excess  5,131  shares have been  authorized  at this time to provide the Holding
Company with  greater  flexibility  to expand or  diversify  its business in the
future.

     For  more  information  about  the  Holding  Company's  common  stock,  see
"COMPARISON OF BANK STOCK WITH HOLDING COMPANY STOCK."

Executive Compensation

     Since its incorporation,  the Holding Company has not paid any remuneration
to any of its  directors  or  executive  officers,  to  date  has  not  proposed
remuneration  to be made in the  future  to any of its  directors  or  executive
officers,  and to date has not  established  standards or other  arrangements by
which its directors  are  compensated  for services as directors,  including any
additional amounts payable for committee  participation or special  assignments.
No  profit-sharing  plan or any other benefit plan exists or is contemplated for
the  Holding  Company.  No change in the  compensation  or  benefits to the Bank
employees is contemplated by reason of the Holding Company formation.

Transactions with Related Parties

     The Holding Company has not engaged in any transactions or entered into any
contracts  with  any of its  directors  or  officers.  No such  transactions  or
contracts are anticipated at this time by the Holding Company.

Certain Anti-Takeover and Indemnification Provisions

     The Holding Company's  Articles of Incorporation give the Holding Company a
right of first  refusal  to  purchase  shares of its stock at a price and on the
terms and  conditions  offered  to a  shareholder  by a  prospective  purchaser.
Transactions  within a  shareholder's  immediate  family and stock  pledges  are
permitted  (although the stocks so  transferred or pledged remain subject to the
right of first  refusal).  The right of first refusal may limit a  shareholder's
ability  to sell  shares  to  purchasers  other  than the  Holding  Company.  In
addition,  the right of first refusal may reduce the likelihood of another buyer
obtaining control of the Holding Company through the acquisition of large blocks
of  holding  company  stock.  The  Bank's  bylaws do not  contain  a  comparable
provision.  See  "COMPARISONS  OF BANK STOCK WITH HOLDING COMPANY STOCK - Market
for the Stock."


                                       16



     As set  forth  in  Sections  180.0850  through  180.0859  of the  Wisconsin
Statutes,  the Bylaws of the Holding  Company  require that the Holding  Company
indemnify  a person  from  all  reasonable  expenses  and  liabilities  asserted
against, incurred by, or imposed on that person in any proceeding to which he or
she is made or  threatened  to be made a party by reason of being or having been
an officer or director of the Holding Company.  Indemnification will not be made
if the person  breached a duty to the  Holding  Company in one of the  following
ways: (a) a willful  failure to deal fairly with the Holding Company in a matter
involving a conflict of interest;  (b) a violation of criminal  law,  unless the
person had  reasonable  cause to believe his or her conduct was lawful or had no
reasonable  cause to believe his or her conduct was unlawful;  (c) a transaction
from  which  the  person  derived  improper  personal  profit;  or  (d)  willful
misconduct.  The right to indemnification  includes, in some circumstances,  the
right to receive  reimbursement  of costs and expenses in such a  proceeding  as
they are incurred.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933, as amended,  may be available to directors,  officers,  and controlling
persons of the Holding  Company  pursuant  to the  foregoing  provisions  of its
Bylaws,  or otherwise,  the Holding Company has been advised that in the opinion
of the Securities and Exchange Commission such indemnification is against public
policy as expressed in the Act.

     The Holding Company may purchase  insurance  against  liabilities  asserted
against its directors,  officers, employees, or agents whether or not it has the
power to indemnify  them against such  liabilities  under the  provisions of its
Bylaws or pursuant to applicable law.  Indemnification  insurance for directors,
officers,  employees,  and agents of the Holding  Company has not been purchased
either by such persons or by Holding Company.

     Sections  180.1140 through 180.1144 of the Wisconsin  Business  Corporation
Law  ("WBCL")  prohibit  certain  "business  combinations"  between a  "resident
domestic  corporation"  and a  person  beneficially  owning  10% or  more of the
outstanding  voting  stock of such  corporation  (an  "interested  stockholder")
within three years after the date such person became a 10% beneficial owner (the
"acquisition date"),  unless the business combination or the acquisition of such
stock has been approved before the acquisition date by the  corporation's  board
of directors.  After such three-year  period,  a business  combination  with the
interested  stockholder may be consummated with the approval of the holders of a
majority  of  the  voting  stock  not  beneficially   owned  by  the  interested
stockholder, or if the combination satisfies certain adequacy-of-price standards
intended to provide a fair price for shares held by  disinterested  stockholders
or  under  certain  other  circumstances.  The  Holding  Company  may  meet  the
definition  of  a  "resident  domestic  corporation"  upon  completion  of  this
offering.

     The foregoing  provisions of the WBCL could have the effect,  among others,
of  discouraging  take-over  proposals  for the  Holding  Company or  impeding a
business  combination between the Holding Company and a major shareholder of the
Holding Company.



                                       17



                       UNION NATIONAL BANK & TRUST COMPANY

History, Business, and Properties

     The Bank was chartered by the Comptroller of the Currency in 1969. The Bank
offers   comprehensive   banking  services  to  the   residential,   commercial,
industrial,   and   agricultural   areas  that  it  serves.   Services   include
agricultural, commercial, real estate and personal loans; checking, savings, and
time deposits; and other customer services, such as safe deposit facilities. The
Bank's loan  portfolio,  as of June 30,  1997,  consisted of  approximately  16%
consumer loans, 12% commercial loans, 65% real estate loans, and 7% agricultural
loans.

     The general banking  business in the State of Wisconsin is characterized by
a high  degree of  competition.  The  principal  methods  of  competition  among
commercial banks are price, including interest rates paid on deposits,  interest
rates  charged  on  borrowings,   and  fees  charged,  and  service,   including
convenience  and  quality of service  rendered  to  customers.  In  addition  to
competition  among commercial  banks,  banks face  significant  competition from
non-banking  financial  institutions,  including savings and loan  associations,
credit unions, small loan companies, and insurance companies.

     There are two other commercial banks, one savings bank and one credit union
located in Sparta.  The Bank's  competition  comes from those  institutions  and
others located near Sparta. Insurance companies, mortgage bankers, and brokerage
firms provide additional competition for certain banking services. The Bank also
competes for interest  bearing funds with issuers of commercial  paper and other
securities, including the United States Government.

     There are no  pending or  threatened  legal  proceedings  known to the Bank
that,  in the  opinion  of the  directors  and  officers  of  the  Bank,  may be
materially adverse to the Bank's financial condition,  business,  or operations.
There are no material pending or threatened legal  proceedings known to the Bank
in which any  director,  executive  officer,  or  affiliate  of the Bank (or any
associate of any of them) has a material interest that is adverse to the Bank.

     The Bank's  principal  banking  office is  located at 124 West Oak  Street,
Sparta,  Wisconsin,  in a facility  built in 1970. On June 30, 1997,  the Bank's
staff included 8 officers and 12 full-time and 5 part-time employees.  There are
approximately 84 shareholders of the Bank.

     On September 26, 1996, the Bank's shareholders  approved the formation of a
bank holding  company for the Bank,  pursuant to the terms and  conditions of an
agreement and Plan of  Reorganization  between the Bank and the Holding  Company
and a Merger  Agreement  between the Bank and the New Bank  whereby (i) the Bank
would become a  wholly-owned  subsidiary  of the Holding  Company,  and (ii) the
Bank's   shareholders   would  become   shareholders  of  the  Holding  Company.
Subsequently,  in  deciding  whether to approve  the  formation  of the  Holding
Company,   the  Federal  Reserve  Bank  expressed   concerns  with  John  Wall's



                                       18



affiliation with the Bank of Cashton.  Because the Bank's  management was unable
to satisfy those concerns,  the Bank withdrew its  application  with the Federal
Reserve Bank and the reorganization was abandoned.

     Upon the  death of John  Wall in  August,  1997,  the  Bank  board  met and
unanimously  decided  to again  proceed  with the  reorganization.  The  Board's
decision is based upon its belief that the Bank's  affiliation  with the Holding
Company is in the best interest of the Bank and the shareholders.

Management

     The following  persons  constitute the executive  officers and directors of
the Bank:



Name and Age                       Position with          Served Since          Number of         Percentage
                                   Bank/Number of                               Shares of
                                   Years at Bank                                Stock (1)

                                                                                          
John J. Sund, Jr., 60              President/              1962                    130                3.4%
                                   Director, 35 yrs

Karl Wall, 44                      Cashier/Vice            1977                    208                5.4
                                   President, 20 yrs

Harold A. Lietzau, 49              Vice President, 5       1992                     20                 .5
                                   yrs

Eugene A. Arenz, 62                Director, 11 yrs        1986                     10                 .3

Gary Edwards, 53                   Director, 8 yrs         1989                     10                 .3

Sherwin Giraud, 53                 Director, 12 yrs        1985                     10                 .3

Donald L. Goodman, 71              Director, 28 yrs        1969                     20                 .5

J. David Rice, 51                  Director, 9 yrs         1988                     68                1.8

TOTALS                                                                             476               12.3%

<FN>
(1) Represents the aggregate  number of shares owned of record  individually and jointly, or by a spouse or children residing at the
same address, and the shares which any such person  controls the right to vote. The beneficial  owners are as follows:

         Eugene Arenz: Spouse, Dorothy Arenz
         Gary Edwards: Spouse, Lorraine Edwards
         Sherwin Giraud: Spouse, Anita Giraud
         Donald Goodman: Spouse, Betty Goodman
         J. David Rice: Spouse, Kathryn Rice
         John J. Sund: Spouse, Marlene E. Sund
         Karl Wall: Spouse, Patricia Wall
</FN>




                                       19



     The term of office for all directors is one year. The directors are elected
at the annual meeting of the  shareholders  of the Bank. All executive  officers
are appointed to their  respective  positions for a one year period by the board
of directors at the annual meeting of the Bank.

Business Background of Directors and Executive Officers

Eugene Arenz:  Mr. Arenz is currently  President of Arenz Shoe Company,  Sparta,
Wisconsin.  He has been in retail shoe sales for the past 41 years and the owner
of his company for the last 11 years.

Gary Edwards:  Mr. Edwards has been a general insurance agent in the Sparta area
for 21 years and the owner of his own agency for the last 11 years.

Sherwin Giraud:  Mr. Giraud was born and raised on a dairy farm. He has been the
owner and operator of his dairy farm, located in Sparta, for the past 21 years.

Donald  Goodman:  Mr. Goodman has been an attorney for the past 46 years.  He is
currently retired from practice.

Harold Lietzau:  Mr. Lietzau is a vice-president  and senior loan officer of the
Bank. He has been employed in the financial  and/or banking field since 1972 and
has worked at the Bank since 1992.

J. David Rice: Mr. Rice has been practicing law for  approximately  20 years. He
is a partner in the law firm of Rice & Heitman, S.C., Sparta, Wisconsin.

John J. Sund,  Jr.: Mr. Sund has been in the banking field since 1963. He became
President  of the Bank in 1992,  and has been on its  Board of  Directors  since
1976.

Karl Wall: Mr. Wall is the Cashier and a vice-president of the Bank. He has been
in the banking  field since 1977 when he began his  employment at the Bank after
graduating  from  college.  He has attended  the  Graduate  School of Banking in
Madison, Wisconsin.



                                       20



Executive Compensation

     The following  tables outline the annual  compensation and estimated annual
benefits  payable  upon  retirement  to Mr.  Sund for  services  rendered in his
capacity as chief executive officer ("CEO") of the Bank:



                                               Summary Compensation Table

Name and Principal Position      Year         Salary ($)          Bonus ($)           Other ($)

                                                                            
John J. Sund                     1996         $70,980.00          $ 500.00            $6150.00(1)
                                 1995         $67,600.00          $ 500.00            $6050.00(1)
                                 1994         $64,350.00          $2000.00            $5950.00(1)

<FN>
(1)  Bank-paid portion of health and life insurance.
</FN>


     The Bank maintains a  noncontributory  pension plan covering  substantially
all of its employees.  The table below reflects  illustrative  estimated  single
life retirement  benefits payable by the plan on an annual basis to participants
at age  65 in  selected  remuneration  and  years  of  service  classifications.
Benefits  paid  to  the   participants   under  the  plan  are  not  reduced  by
participants' Social Security benefits.



                                     Pension Plan Table

Remuneration                                Years of Service
Average Final Earnings       15           20           25           30           35*

                                                             
    $50,000               $13,050       $17,400      $21,750      $26,100      $30,450
     75,000               $20,925       $27,900      $34,875      $41,850      $48,825
    100,000               $28,800       $38,400      $48,000      $57,600      $67,200
    125,000               $36,675       $48,900      $61,125      $73,350      $85,575
    150,000               $44,550       $59,400      $74,250      $89,100      103,950

<FN>
*  Maximum number of years credited for benefit accrual  purposes.  Benefits are based 
on covered compensation for someone born in 1936.
</FN>




                                       21



     The credited years of service and the current average covered  remuneration
for Mr. Sund, as of December 31, 1996, are 34 years and $5,486.00 per month. The
compensation reported in the Pension Plan Table is separate from and in addition
to the annual compensation reported in the Summary Compensation Table above.

Director Compensation

     Each of the following  directors is paid $500 on a monthly basis, to attend
all regular and special  meetings of the board of directors of the Bank:  Eugene
Arenz, Gary Edwards,  Sherwin Giraud, Donald Goodman and J. David Rice. No other
directors  receive any compensation  from the Bank for their services as members
of the board of directors.

Board Review of Management Compensation

     The entire board of directors  reviews and determines the  compensation for
the officers of the Bank.  The executive  officers that are members of the board
of directors and thus participate in the decisions  concerning  compensation are
John J. Sund Jr., Harold Lietzau and Karl Wall.

Principal Shareholders

     As of the  date of this  Prospectus,  the  following  persons  are the only
persons  (including  any "group" as used in Section  13(d)(3) of the  Securities
Exchange Act of 1934) known to the Bank to be the beneficial  owner of more than
five percent of the Bank's outstanding capital stock:

Name and Address                                 Shares               Percent

Doris Wall and John R. Wall (deceased)            1,306                33.8%
1012 North Fairway Drive
Sparta, WI  54656


Description of the Stock of the Bank

     As of the date  hereof,  the Bank is  authorized  to issue 4,100  shares of
common  stock,  all  of  one  class,  of  which  3,869  shares  are  issued  and
outstanding.  The Bank has approximately 84 shareholders of record.  For further
information  about the Stock, see "COMPARISON OF BANK STOCK WITH HOLDING COMPANY
STOCK."



                                       22



Transactions with Related Parties

     The Bank has had in the ordinary  course of business,  and will continue to
have in the future,  banking  transactions  such as personal and business  loans
with its directors,  officers, and/or the owners of more than ten percent of the
Bank  stock.  Such  loans  are now and will  continue  to be on the same  terms,
including collateral and interest rate, as those prevailing at the same time for
comparable  transactions  with others of similar credit  standing and do not and
will not in the future  involve  more than  normal  risks of  collectibility  or
present other unfavorable features.

     At no time during  1994,  1995,  and 1996 did or has the maximum  aggregate
direct and indirect  extensions of credit to such persons and to such businesses
in which such persons are  interested,  as a group,  exceed ten percent (10%) of
the Bank's  capital.  From time to time,  the Bank has entered  into  nonbanking
business  transactions  with  entities  with  which  some of its  directors  are
affiliated.  Those  transactions  have  been at arm's  length  and have  been at
competitive prices.

Indemnification of Directors and Officers

     Wisconsin law governing indemnification of the Bank's directors,  officers,
and employees is substantially  similar to the law governing  indemnification of
the Holding Company's directors, officers, and employees. For a brief discussion
of that law, see "SPARTA UNION BANCSHARES,  INC. - Indemnification  of Directors
and Officers and Certain Anti-takeover Provisions."

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933, as amended,  may be permitted to directors,  officers,  and controlling
persons of the Bank pursuant to the foregoing provisions, or otherwise, the Bank
has been advised that in the opinion of the Securities  and Exchange  Commission
such indemnification is against public policy as expressed in the Act.

     The Bank has  purchased  insurance  insuring the Bank,  its  directors  and
officers,  against  liabilities  asserted  against its  directors  and  officers
subject  to  certain  conditions  and  limitations.  Expenses  of an  officer or
director in such a proceeding may be advanced based upon her or his agreement to
repay  such  expenses  if it is  determined  that he or she is not  entitled  to
indemnification.  If the  officer or director  is  successful  on the merits his
expenses  shall  be paid;  otherwise  indemnification  can  only be made  upon a
showing that he or she met the applicable standard of conduct as determined by a
court, a quorum of disinterested  directors, by independent legal counsel, or by
the shareholders.


                                       23




Shares of the Stock Owned or Controlled by Management

     As of the date hereof, the executive officers and directors of the Bank own
or control,  directly or  indirectly,  476 shares of the Stock,  or 12.3% of the
total Bank stock outstanding.  To the knowledge of the Holding Company no person
above  named  has any  material  interest  in the  transaction  proposed  by the
reorganization, direct or indirect, other than in their status as shareholders.

     In March 1997, in response to an unsolicited proposal to buy shares of Bank
stock from certain Bank  shareholders by another  financial trust,  several Bank
shareholders,  including the Bank's  executive  officers and directors,  entered
into an agreement whereby those  shareholders  agreed to give those shareholders
who  signed  the  agreement  a right  of first  refusal.  Under  the  agreement,
shareholders  could  purchase  a number of shares  equal to their  proportionate
interest in the Bank. Those shareholders have agreed to terminate that agreement
upon the successful consummation of this reorganization.

Recommendation of the Bank's Board of Directors

     The Board of Directors of the Bank recommends that all shareholders vote to
approve the  reorganization.  The decision of the Board of Directors of the Bank
to recommend the  reorganization  to the  shareholders  is based on their belief
that the Bank's  affiliation with the Holding Company is in the best interest of
the Bank and its shareholders.

     Such  belief  is  based  on a  number  of  factors,  including  recent  and
historical  transactions  in the Bank's capital  stock,  the Board of Directors'
knowledge  of  the  business,  operations,   properties,  assets,  earnings  and
prospects  of the  Bank,  and  the  advantages  provided  by a  holding  company
corporate  organizational  structure. The Board of Directors of the Bank did not
attach a relative  weight to the factors it considered in reaching its decision,
but   considering   all  factors  made  the   determination   to  recommend  the
reorganization  to the shareholders.  See "THE  REORGANIZATION - Reasons for the
Reorganization."

                              FINANCIAL INFORMATION

     Financial  statements,  prepared  in  accordance  with  generally  accepted
accounting  principles  and dated  December  31,  1996,  with  compiled  interim
financial statements dated June 30, 1997, accompany this Prospectus.



                                       24




                            COMPARISON OF BANK STOCK
                           WITH HOLDING COMPANY STOCK

Authorized Shares and Par Value

     The Bank is authorized to issue 4,100 shares of capital  stock,  all of one
class,  designated  as common  stock.  Of those 4,100  shares,  3,869 shares are
issued and outstanding.  The Holding Company is authorized to issue 9,000 shares
of capital  stock,  all of one class,  designated  as common  stock.  No Holding
Company  stock has been  issued.  Either the Bank or the Holding  Company  could
increase  the  amount of  authorized  stock at any time by an  amendment  to its
Articles of Association or Incorporation approved by its shareholders.

     The  Holding  Company  will  issue  less than the full  amount of its 9,000
authorized  shares in the  reorganization.  The Holding  Company has no specific
plans at this time  regarding the sale or  distribution  of any  authorized  but
unissued shares.

Voting Rights

     Each  share of Bank  stock  has one vote on all  matters  presented  to the
shareholders  of the Bank.  Each act by the  shareholders of the Bank requires a
majority  vote,  except as  otherwise  provided by law.  Bank  shareholders  are
entitled to  cumulative  voting in the election of  Directors.  Similarly,  each
share of the Holding Company stock has one vote on all matters  presented to the
shareholders of the Holding Company. Each act by the shareholders of the Holding
Company  requires a majority  vote,  except as  otherwise  provided by law.  The
Holding Company will not have cumulative voting in the election of Directors.

     There  are some  differences  in the  voting  requirements  imposed  by the
federal  banking laws as compared to the Wisconsin  general  corporate laws. For
example,  under  federal  banking law, a  shareholder  vote of two-thirds of the
outstanding Bank stock is required to approve a Bank merger. Under the Wisconsin
Business  Corporation  Law,  however,  a vote of the majority of the outstanding
Holding Company stock can approve a Holding Company merger. Additionally,  under
the  Wisconsin  Business  Corporation  Law,  a  vote  of  the  majority  of  the
outstanding  Holding Company stock can amend the Holding  Company's  articles of
incorporation,   whereas  under  federal  banking  law,  a  two-thirds  vote  of
shareholders is required to amend the Bank's articles of association.

     All of the  directors  of the Bank and the  Holding  Company are elected at
each respective  annual meeting.  Currently,  the shareholders of the Bank elect
the Bank's Board of Directors at the Bank's annual meeting of shareholders  held
in January of each year.  Bank  shareholders  exercise  direct  control over the
Bank's  affairs by election of the Bank's  directors and by the right to vote on
other Bank matters from time to time.



                                       25



     If the proposed reorganization is consummated, the shareholders who receive
Holding  Company stock will elect the Holding  Company  Board of Directors.  The
officers of the Holding Company will be elected  annually by the Holding Company
Board of Directors.  The officers of the Holding Company will vote the shares of
Bank stock held by the Holding Company,  and therefore will elect the Bank Board
of Directors,  acting pursuant to the  instructions of the Board of Directors of
the Holding Company.  There is no requirement that the boards of the Bank and of
the Holding  Company be  identical.  Shareholders  of the Holding  Company  will
exercise  direct  control  over the  Holding  Company by election of the Holding
Company  directors  and by other voting  rights,  and  therefore  will  exercise
indirect  control  over the Bank.  The direct  control of the Bank stock will be
exercised by the Holding Company Board of Directors, who are obligated to act in
the best interests of the Holding Company shareholders.

Dividends

     The Bank has paid cash  dividends on its common stock each year since 1969,
and expects to continue to pay dividends in the future.  Recent  dividends  have
been as follows:

                                                     Dividend
                  Year                               Per Share

                  1992                               $ 18.00
                  1993                                 19.00
                  1994                                 20.00
                  1995                                 20.00
                  1996                                 22.00

     It is the intention of the Board of Directors of the Holding Company to pay
cash dividends on its common stock at least annually.  Substantially  all of the
Holding  Company's  assets  will  consist  of its  investment  in the Bank,  and
immediately after the  reorganization the availability of funds for dividends to
be paid by the  Holding  Company  will  depend  primarily  upon the  receipt  of
dividends from the Bank. Dividends of the Holding Company will also be dependent
on future  earnings,  the  financial  condition  of the Holding  Company and its
subsidiaries, and other factors.

     Whether the  dividends,  if any, paid by the Holding  Company in the future
will be equal to, less than, or more than the dividends  paid by the Bank in the
past cannot be predicted.  However,  it is unlikely that  dividends  paid by the
Holding  Company in the initial few years of  operation  would be  significantly
larger than the dividends  paid by the Bank in prior years,  and such  dividends
may  not be as  large.  If the  Holding  Company  incurs  indebtedness,  such as
expenses for the  reorganization  or a loan to purchase  Holding  Company stock,
Bank  dividends  received by the  Holding  Company  will be applied  toward that
indebtedness,  at  least  in  part,  rather  than  be paid  to  Holding  Company
shareholders as dividends from the Holding Company.



                                       26



     Under  applicable  national  banking law, the Bank is  restricted as to the
maximum  amount of dividends it may pay on its common stock. A national bank may
not pay dividends except out of undivided profits. Additionally, a national bank
may not pay any dividend until an amount equal to at least 10% of net income for
the preceding two consecutive half years has been  transferred to surplus.  Such
transfers  are required  until the surplus fund equals 100% of the bank's common
capital.  A bank's  ability to pay dividends may also be restricted in the event
that losses in excess of undivided profits have been charged against surplus and
in certain other circumstances.  Federal regulators have authority to prohibit a
bank from  engaging  in any  action  deemed by them to  constitute  an unsafe or
unsound  practice,  including  the  payment of  dividends.  In  addition  to the
foregoing,  Wisconsin  business  corporations  such as the  Holding  Company are
prohibited by Wisconsin law from paying dividends while they are insolvent or if
the payment of dividends  would render them unable to pay debts as they come due
in the usual course of business.

Market for the Stock

     (a)  In  General:  As  of  August  1997,  the  Bank  had  approximately  84
shareholders of record. No established public trading market exists for the Bank
stock. No brokerage firm regularly makes a market for the Bank stock.  The stock
is  infrequently  traded,  and the current market for the stock is limited.  The
Bank is  prohibited  by law from  purchasing  its own  shares  except in limited
circumstances.

     Similarly,  there will be no established  public trading market for Holding
Company stock. Unlike the Bank,  however,  the Holding Company will generally be
able to purchase its own shares. In some  circumstances,  a bank holding company
may not  purchase  its own shares  without  giving  prior  notice to the Federal
Reserve  Board.  If the Holding  Company  desires to purchase as much as 10% (in
value) of its own  stock in any  12-month  period,  it may be  required  in some
instances to obtain  approval for so doing from the Federal  Reserve  Board.  If
less than 10% is purchased,  however,  the Holding Company is restricted only by
sound business judgments, its prior commitments,  and the consolidated financial
condition  of the  Holding  Company  and its  subsidiaries.  In no  event  may a
Wisconsin  corporation purchase its own shares when the corporation is insolvent
or when such a purchase  would make it insolvent.  Although the Holding  Company
may generally,  in the Board's  discretion,  purchase shares of its stock, it is
not obligated to do so.

     (b) Right of First  Refusal:  Pursuant  to  Article 5A of its  Articles  of
Incorporation,  the  Holding  Company  shall  have a right of first  refusal  to
purchase  any  shares of its stock at the price and on the terms and  conditions
offered  to  any  Holding  Company  shareholder  by  a  prospective   purchaser.
Stockholders  should  refer to  Article  5A of the  Articles  of  Incorporation,
attached  as  Exhibit  D. The  following  description  does not  purport to be a
comprehensive  statement  of the terms of the Holding  Company's  right of first
refusal.



                                       27



     (i) Summary of the Provision. The right of first refusal shall apply to all
sales,  assignments,  or dispositions  of any right,  title or interest in or to
Holding Company shares, whether voluntary or by operation of law, except for (1)
transactions between a shareholder and his or her spouse, a member of his or her
immediate family or lineal  descendants of his or her immediate family,  and (2)
any pledge of Holding Company stock.  For purposes of transactions  described in
(1), "immediate family" shall mean a shareholder's children, ancestors, brothers
and sisters  (whether by full or half blood),  the spouses of such  brothers and
sisters,  and the lineal decedents of the shareholder's  spouse.  Transferees in
either  of the  transactions  described  in (1) or (2) shall be  subject  to the
Holding  Company's right of first refusal.  The Holding Company is not obligated
to  make  any  purchases  of the  Holding  Company  stock,  but may do so at the
discretion of its Board of Directors.

     In the event a shareholder (the "Selling Shareholder"),  desires to dispose
of his or her shares of stock,  or any portion  thereof (the "Offered  Shares"),
other than in a transaction of the type  described in (1) or (2) above,  without
first  obtaining  the  written  consent  of the  Holding  Company,  the  Selling
Shareholder,  first, shall give the Holding Company written notice of his or her
intent to do so, stating the identity of the proposed  transferee of the Offered
Shares,  the  number of Offered  Shares  the  Selling  Shareholder  proposes  to
transfer,  the proposed consideration for the Offered Shares and the other terms
and  conditions  of the  proposed  transfer of the Offered  Shares.  The Holding
Company  shall have a right of first  refusal to acquire  all, but not less than
all,  of the  Offered  Shares for the  consideration  and on the other terms and
conditions  offered by the proposed  transferee  and as contained in the written
notice  given to the  Holding  Company by the Selling  Shareholder.  The Holding
Company shall exercise its right to acquire the Offered Shares by giving written
notice to the Selling  Shareholder,  indicating  the number of Offered Shares it
will acquire,  within thirty (30) days  following  receipt of the written notice
from the Selling  Shareholder.  If the Holding  Company  does not  exercise  its
acquisition  rights within that time period,  the Selling  Shareholder  shall be
free for a period of thirty (30) days  thereafter to transfer all of the Offered
Shares  to the  transferee  identified  in the  written  notice  to the  Holding
Company,  at the same  consideration  and on the same terms and  conditions  set
forth in the notice.  After giving notice of the intended transfer,  the Selling
Shareholder  shall  refrain  from  participating  as  an  officer,  director  or
shareholder  of the  Holding  Company  with  respect  to the  Holding  Company's
decision on whether or not to acquire the Offered Shares unless requested by the
other  shareholders  holding a majority  of the  Holding  Company's  outstanding
shares  of  capital  stock,  not  including  the  shares  held  by  the  Selling
Shareholder.  As a condition  precedent to the  effectiveness of any transfer of
Offered Shares,  the transferee shall agree in writing to be bound by all of the
terms and conditions of the Holding Company's right of first refusal.

     Each certificate  representing shares of Holding Company stock shall bear a
legend in substantially the following form:

          "The shares represented by this certificate and any sale, transfer, or
          other  disposition  thereof  are  restricted  under and subject to the
          terms and  conditions  contained  in Article  5A of the  Corporation's
          Articles of  Incorporation,  a copy of which is on file at the offices
          of the Corporation."

                                       28




     The provisions of the Holding Company's Articles of Incorporation  relating
to this right of first refusal may not be amended, altered or repealed except by
the  affirmative  vote of the  holders of at least  two-thirds  (2/3rds)  of the
shares of Holding Company stock.

     (ii) Potential Anti-takeover and Other Effects. The Holding Company's right
of first  refusal may reduce the ability of third  parties to obtain  control of
the Holding  Company.  In particular,  the Holding  Company's right to match the
price offered by a prospective  buyer might make acquisitions of large blocks of
Holding Company stock by other buyers more difficult. The right of first refusal
might also discourage tender offers,  proxy contests,  or other attempts to gain
control  of the  Holding  Company  through  the  acquisition  of  voting  stock.
Shareholders  who might  support the takeover of the Holding  Company in a given
situation could amend, alter or repeal the right-of-first-refusal provision only
by obtaining an  affirmative  vote of two-thirds  of the issued and  outstanding
shares.

     Because of these  effects,  this  provision  may render  removal of current
management  by a new owner less  likely.  This could be the case  whether or not
such removal would be  beneficial to  shareholders  generally.  Another  overall
effect  of  the  provision  may  be  to  limit   shareholder   participation  in
transactions such as tender offers.

     Whether the right of first refusal  serves as an advantage to management or
to  shareholders  depends on the particular  circumstances.  In a hostile tender
offer,  for example,  members of  management  and  shareholders  who support the
present ownership may benefit from the provision, while shareholders desirous of
participating in the tender offer or removing management would be disadvantaged.

     The Holding Company's  charter and bylaws do not contain  provisions having
an  anti-takeover  effect  other  than  the   right-of-first-refusal   provision
described above.

     (iii)  Reasons for the Right of First  Refusal.  The Boards of Directors of
the Holding Company and the Bank believe that giving the Holding Company a right
of first refusal to purchase shares of its stock is in the best interests of the
Holding  Company  and its  shareholders  and the Bank.  One of the  purposes  of
forming a Holding  Company for the Bank is to enable the Bank to continue  under
local control.  The proposed right of first refusal  effectuates this purpose by
providing a mechanism for assuring local control of the Holding  Company and the
Bank.  The  proposal  is not the result of Bank  management's  knowledge  of any
specific  effort to  obtain  control  of the Bank by means of a  merger,  tender
offer, solicitation in opposition to management or otherwise.  Nevertheless, the
Boards of Directors are concerned that, without this provision, local control of
the Bank may not be achieved over the long term.



                                       29




Value

     As of June 30, 1997, the per share book value of the Bank Stock,  according
to the Bank's internal financial statements, was approximately $2,122.00. To the
best  knowledge  of the Bank,  there have been 40  different  transfers  of Bank
stock,  involving a total of 1,248 shares of Bank stock, between January 1, 1990
and the date of this Prospectus.

     An appraisal  of the Bank stock  prepared for the Bank's Board of Directors
by Bankers' Service Corporation as of December 31, 1995,  estimated the value of
the Bank's stock as it relates to minority share  transactions  at $1,807.00 per
share,  or 80% of book value.  The following is a listing of sales of Bank stock
known to the Bank for the years shown. Where no "Price Per Share" is stated, the
price is not known to the Bank.

      Date                  Number of Shares              Price Per Share

   August 1990                    10                         $  400.00
                                  10                         $  400.00
                                  16                         $  400.00
                                  11
                                  11
                                  11
                                  11
   December 1990                  76
                                  76
                                  76
                                  18                         $  400.00
   May 1991                       20                         $  400.00
   July 1991                      20                         $  400.00
   August 199                     40                         $  400.00
   May 1994                        8                         $  400.00
   June 1994                      66                         $  400.00
                                   6                         $  400.00
                                  36                         $  400.00
                                  35                         $  400.00
   January 1997                   20                         $2,200.00
   March 1997                     36                         $2,200.00
                                  70                         $2,200.00
   April 1997                     22                         $2,200.00
                                  27                         $2,200.00
                                  27                         $2,200.00
                                  27                         $2,200.00
                                  27                         $2,200.00
                                  10                         $2,200.00



                                       30



   May 1997                      124                         $2,200.00
                                   8                         $2,200.00
                                  12                         $2,200.00
                                 104                         $2,200.00
   June 1997                       5                         $1,900.00
   July 1997                      50                         $1,900.00
                                   5                         $1,900.00
                                   5                         $1,900.00
                                  12                         $1,900.00
                                  10                         $1,900.00
                                  25                         $1,900.00
                                  38                         $1,900.00
   August 1997                    20                         $1,900.00
                                   8                         $1,900.00



Other

     (a)  Liquidation  Rights:  Shareholders of the Bank and the Holding Company
are  entitled  to share pro rata in the net  assets of the  organization,  after
payment of all liabilities, if the organization is ever liquidated.

     (b) Preemptive  Rights:  Shareholders of the Bank have preemptive rights to
acquire  additional shares of the organization that may be issued in the future.
Shareholders of the Holding Company will not have preemptive rights.  Authorized
but  unissued  shares  of  Holding  Company  may be  issued  for  cash or  other
consideration  on  authorization  of the Board of Directors for proper corporate
purposes.

     (c) Conversion Rights: Neither the Bank stock nor the Holding Company stock
is convertible into any other security.

     (d) Call:  Neither the Bank stock nor the Holding  Company stock is subject
to any call or redemption rights on the part of the organization.

     (e)  Assessability:  All of the Bank and Holding Company stock issued or to
be issued is or will be fully paid and nonassessable, except as provided by law.
The  Wisconsin  Business  Corporation  Law  imposes  a  statutory  liability  on
shareholders  of every  corporation  up to an  amount  equal to the par value of
their shares,  and to the consideration for which their shares without par value
were issued,  for all debts owing to employees of the  corporation  for services
performed for such corporation, but not exceeding six months' service in any one
case.




                                       31



                           SUPERVISION AND REGULATION

General

     Financial   institutions  and  their  holding   companies  are  extensively
regulated  under  federal and state law.  Consequently,  the growth and earnings
performance  of the Holding  Company  and the Bank can be  affected  not only by
management decisions and general economic  conditions,  but also by the statutes
administered  by, and the  regulations  and  policies of,  various  governmental
regulatory authorities including, but not limited to, the Federal Reserve Board,
the Federal  Deposit  Insurance  Corporation  ("FDIC"),  the OCC,  the  Internal
Revenue Service,  federal and state taxing  authorities,  and the Securities and
Exchange  Commission (the "SEC").  The effect of such statutes,  regulations and
policies  can be  significant,  and cannot be  predicted  with a high  degree of
certainty.

     Federal and state laws and  regulations  generally  applicable to financial
institutions and their holding companies regulate, among other things, the scope
of business, investments,  reserves against deposits, capital levels relative to
operations,  the nature and amount of collateral for loans, the establishment of
branches,  mergers,  consolidations and dividends. The system of supervision and
regulation  applicable  to the  Holding  Company  and  the  Bank  establishes  a
comprehensive   framework  for  their  respective  operations  and  is  intended
primarily  for the  protection  of the FDIC's  deposit  insurance  funds and the
depositors, rather than the shareholders, of the Bank.

     The following references to material statutes and regulations affecting the
Holding Company and the Bank are brief  summaries  thereof and do not purport to
be complete,  and are qualified in their  entirely by reference to such statutes
and regulations. Any change in applicable law or regulations may have a material
effect on the business of the Holding Company and the Bank.

Banking Regulation

     The Holding Company,  if the  reorganization is successful,  will be a bank
holding  company  subject to the  supervision  of the Board of  Governors of the
Federal  Reserve  System under the Bank Holding  Company Act of 1956, as amended
(the "Act").  In  accordance  with Federal  Reserve  Board  policy,  the Holding
Company  will be expected to act as a source of  financial  strength to the Bank
and to commit resources to support the Bank in  circumstances  where the Holding
Company  might not do so absent such  policy.  As a bank  holding  company,  the
Holding  Company  will be  required to file with the Board of  Governors  annual
reports and such  additional  information  as the Board of Governors may require
pursuant to the Act. The Board of Governors  may also make  examinations  of the
Holding Company and its subsidiary.

     The Act requires every bank holding company to obtain the prior approval of
the Board of  Governors  before it may acquire  direct or indirect  ownership of



                                       32




more than five percent (5%) of the voting securities or substantially all of the
assets of any bank. The Act limits the  activities by bank holding  companies to
managing,  controlling,  and servicing their subsidiary banks and to engaging in
certain  non-banking  activities  which  have  been  determined  by the Board of
Governors to be closely related to banking.  Similarly,  the Act, with specified
exceptions  relating to  permissible  non-banking  activities,  forbids  holding
companies from acquiring  voting control  (generally,  25% or more of the voting
power) of any company which is not a bank. Some of the activities that the Board
of Governors has  determined by regulation to be closely  related to banking are
making or servicing  loans,  leasing real and personal  property where the lease
serves  as  the  functional   equivalent  of  an  extension  of  credit,  making
investments in corporations or projects designed  primarily to promote community
welfare, acting as an investment or financial advisor, providing data processing
services,  and acting as an insurance agent or broker,  as those  activities are
defined and limited by the regulation.

     Subsidiary  banks  of  a  bank  holding  company  are  subject  to  certain
restrictions  imposed by the Federal  Reserve Act on any extensions of credit to
the bank holding company or any of its subsidiaries, on investments in the stock
or other  securities  thereof,  and on the taking of such stock or securities as
collateral for loans to any borrower.  Further, under the Act and regulations of
the  Board  of  Governors,  a bank  holding  company  and its  subsidiaries  are
prohibited  from engaging in certain tie-in  arrangements in connection with any
extension  of credit or  provision  of any  property or  services.  The Board of
Governors  possesses  cease and desist  powers over bank holding  companies  and
their  non-banking  subsidiaries if their actions represent an unsafe or unsound
practice or a violation of law.

     The  Bank  is a  national  bank  and  is  subject  to the  supervision  and
examination  of the  Comptroller  of the  Currency.  The Bank is a member of the
Federal  Deposit  Insurance  Corporation.  Areas  subject to  regulation  by the
authorities  include  reserves,   investments,   loans,  mergers,   issuance  of
securities,  payment of dividends,  establishment of branches, and other aspects
of banking operations.

Capital Requirements for the Holding Company and the Bank

     The Federal  Reserve Board and the OCC use capital  adequacy  guidelines in
their examination and regulation of bank holding companies and banks. If capital
falls below minimum  guideline  levels,  a bank holding company may, among other
things, be denied approval to acquire or establish  additional banks or non-bank
businesses.

     The Federal  Reserve Board and the OCC's capital  guidelines  establish the
following minimum regulatory capital requirements for bank holding companies and
banks: a risk-based requirement expressed as a percentage of total risk-weighted
assets,  and a leverage  requirement  expressed as a percentage of total assets.
The  risk-based  requirement  consists of a minimum  ratio of total capital to a
total  risk-weighted  assets  of 8%, of which at least  one-half  must be Tier 1
capital (which  consists  principally  of  stockholders'  equity).  The leverage



                                       33




requirement  consists of a minimum ratio of Tier 1 capital to total assets of 3%
for the most highly rated companies,  with minimum  requirements of 4% to 5% for
all others.

     As of June 30, 1997, the Bank's Tier 1 risk-based  ratio was  approximately
22.88%,  its total risk-based  capital ratio was approximately  24.00%,  and its
leverage ratio was approximately 12.46%.

     The risk-based and leverage standards presently used by the Federal Reserve
Board and the OCC are minimum  requirements,  and higher  capital levels will be
required  if  warranted  by the  particular  circumstances  or risk  profiles of
individual banking organizations. Further, any banking organization experiencing
or anticipating significant growth would be expected to maintain capital ratios,
including  tangible capital  positions (i.e., Tier 1 capital less all intangible
assets), well above the minimum levels.

     The Federal Reserve Board's  regulations provide that the foregoing capital
requirements   will  generally  be  applied  on  a  bank-only   (rather  than  a
consolidated)  basis in the case of a bank  holding  company with less than $150
million in total consolidated assets.

Liquidity Requirements for Holding Company and Bank

     Generally, under federal banking law, a national bank may purchase and sell
for its own account three different  types of  investments.  A bank may purchase
and sell an unlimited amount of Type 1  securities--that  is, obligations of the
United States or general obligations of a state or a political  subdivision of a
state--subject  only to the  exercise of prudent  banking  judgment.  A bank may
purchase  for its own account  Type II and III  securities,  when in its prudent
business  judgment it believes that the obligator will,  among other things,  be
able to meet all debt  service  obligations  and that the  security  is  readily
marketable.  A bank may not hold Type II and III securities of any one obligator
in a total amount in excess of 10% of the bank's  capital and  surplus.  Type II
securities include general obligations of a state or a political  subdivision or
any  agency of a state or  political  subdivision  for  housing,  university  or
dormitory purposes.

     The OCC does not have any specific  requirements  as to a bank's  liquidity
adequacy.  Rather,  the OCC reviews a number of  different  factors to determine
whether a bank's  liquidity  is adequate.  These  factors  include,  among other
things,  the bank's  capital  adequacy  (this factor is discussed in more detail
above in the  section  titled  "Capital  Requirements  for  Holding  Company and
Bank"), its funds management practices, its core deposits, its volatile deposits
(generally,  deposits that are not  insured),  its liquid assets and whether the
funding  meets of the bank.  The Bank  believes  that its present  liquidity  is
adequate.

     The Federal Reserve Board's Regulation Y does not impose specific liquidity
requirements on bank holding companies.  However, a key principle underlying the
Federal  Reserve  Board's  supervision  of bank  holding  companies is that such
companies  should be  operated in a way that  promotes  the  soundness  of their



                                       34




subsidiary  banks.  In this  regard,  a principal  objective  of a bank  holding
company's  funding  strategy  should  be  to  support  capital   investments  in
subsidiaries   with  capital  and  long-term  sources  of  funds,  and  maintain
sufficient  liquidity  and  capital  strength  to  provide  assurance  that  any
outstanding  debt  obligations  can be  serviced  and repaid  without  adversely
affecting the condition of the affiliated  bank. In addition,  there are special
rules  limiting  acquisition  of debt in connection  with the formation of small
one-bank holding companies.  The Federal Reserve Board requires that new holding
companies' debt-to-equity ratio decline to 30% within 12 years after acquisition
of a bank  and  that  the  holding  company  will be able to  safely  meet  debt
servicing and other  requirements  imposed by its creditors.  The debt-to-equity
ratio limitations are generally applied to releveraging  transactions  except in
connection with further bank acquisitions.

FDIC Insurance Premiums

     The Bank pays deposit insurance  premiums to the FDIC based on a risk-based
assessment  system  established by the FDIC for all institutions  insured by the
Bank Insurance Fund of the FDIC ("BIF"). Beginning January 1, 1997, and for each
of the years 1997,  1998 and 1999, the Bank will pay premiums on its BIF-insured
deposits at the minimum for top rated banks. the premium  assessable in 1997 for
BIF insurance is approximately $4,000.00.

Loan Limits to Borrowers

     Generally,  under federal banking laws, a national bank may make to any one
borrower  total loans and  extensions  of credit not fully secured by collateral
having a market  value at least equal to the loan in an amount not to exceed 15%
of the unimpaired  capital and unimpaired  surplus of the bank.  Generally,  the
total loans to any one person fully  secured by marketable  collateral  having a
value  at  least  equal  to the  outstanding  loan  may  not  exceed  10% of the
unimpaired  capital and unimpaired  surplus of the bank. Bank holding  companies
are not subject to specific limitations on loans to one borrower.  However, bank
holding  company  lending  activities  require the prior approval of the Federal
Reserve Board under Regulation Y.

Recent Regulatory Developments

     On September 23, 1994,  the "Riegle  Community  Development  and Regulatory
Improvement  Act of 1994" (the "Riegle Act") was signed into law. The provisions
of Title  III of the  Riegle  Act are  intended  to  reduce  the  paperwork  and
regulatory burdens of federally-insured financial institutions and their holding
companies. These provisions require the federal banking regulators,  among other
things: (i) to consider the burdens and benefits to depository  institutions and
their customers of proposed  regulatory and  administrative  requirements;  (ii)
within two years of the  enactment  of the Riegle act, to  eliminate  from their
regulations  and  written  supervisory   policies  regulatory   inconsistencies,
outmoded or  duplicative  requirements  and  unwarranted  constraints  on credit
availability  and to adopt uniform  requirements to implement  common  statutory
schemes or regulatory  concerns;  (iii) to create a unified  examination process
for  financial  institutions  subject  to the  jurisdiction  of  more  than  one



                                       35




regulator;  (iv) within six months of  enactment of the Riegle Act, to establish
an internal  regulatory  appeals  process by which  regulated  institutions  may
obtain review of agency  determinations  relating to such matters as examination
ratings,  adequacy of loan loss reserves and significant  loan  classifications;
(v) to streamline  the quarterly  call report  format;  and (vi) in  considering
revisions to risk-based capital requirements,  to ensure that the standards take
into account the size,  activities and reporting  burdens of  institutions.  The
Riegle Act also gives the federal  banking  agencies  greater  flexibility  with
respect to the  implementation  and  enforcement  of certain  provisions  of the
Federal  Deposit  Insurance  Corporation  Improvement  Act of  1991  ("FDICIA"),
including  the  FDICIA  provisions  regarding  safety and  soundness  standards,
examination frequency and independent audit requirements.

     In addition, on September 29, 1994, the "Riegle-Neal Interstate Banking and
Branching  Efficiency Act of 1994" (the "Riegle-Neal  Act") was signed into law.
Effective  September 29, 1995, the Riegle-Neal Act allows bank holding companies
to acquire  banks located in any state in the United  States  without  regard to
geographic  restrictions or reciprocity  requirements  imposed by state law, but
subject to certain conditions,  including limitations on the aggregate amount of
deposits  that  may be  held by the  acquiring  holding  company  and all of its
insured  depositor   institution   affiliates.   Effective  June  1,  1997,  the
Riegle-Neal Act allows banks to establish  interstate  branch  networks  through
acquisitions of other banks,  subject to certain  conditions,  including certain
limitations  on the  aggregate  amount  of  deposits  that  may be  held  by the
surviving bank and all of its insured  depository  institution  affiliates.  The
establishment  of de novo  interstate  branches or the acquisition of individual
branches  of a  bank  in  another  state  (rather  than  the  acquisition  of an
out-of-state  bank in its  entirety) is allowed by the  Riegle-Neal  Act only if
specifically  authorized  by state law. The  Riegle-Neal  Act is not expected to
have an immediate  significant  impact on the Holding  Company or the Bank. Over
time, however, the provisions of the Riegle-Neal Act may increase competition in
the market served by the Holding Company and the Bank.

                              AVAILABLE INFORMATION

     The Holding  Company has filed with the Securities and Exchange  Commission
("SEC"),  Washington,  D.C., a Registration  Statement (No. _______) on Form S-4
under the Securities Act of 1933, for the  registration of Holding Company stock
to be issued in the reorganization.  This Prospectus  constitutes the Prospectus
that was filed as a part of that registration statement.

     The Bank  currently is not subject to the  requirements  of the  Securities
Exchange Act of 1934 ("Exchange  Act"), and files no reports or proxy statements
with the SEC pursuant thereto.  After  consummation of the  reorganization,  the
Holding  Company will be subject to the reporting  requirements  of the Exchange
Act,  pursuant to Section 15(d) thereof,  but the Holding Company's duty to file
such reports is automatically  suspended as to each fiscal year at the beginning
of which the  Holding  Company's  stock is held by fewer than 300  shareholders.
Immediately upon completion of the  reorganization,  the Holding Company's stock
will be held by no more than 84 shareholders.  Accordingly,  the Holding Company



                                       36




will not for the  foreseeable  future file reports or proxy  statements with the
SEC.  However,  the Holding Company will voluntarily  provide  shareholders with
reports  of the same  nature,  and with the  same  frequency,  as are  currently
provided by the Bank to Bank shareholders.

                                  LEGAL MATTERS

     Certain legal matters in connection with the reorganization  will be passed
upon for the Holding Company and the Bank by Boardman,  Suhr, Curry & Field, One
South Pinckney Street, Madison, Wisconsin 53701-0927.



                                       37




                                    EXHIBIT A

                      AGREEMENT AND PLAN OF REORGANIZATION







                      AGREEMENT AND PLAN OF REORGANIZATION

     THIS  AGREEMENT  and  Plan of  Reorganization  ("Agreement")  is made as of
____________,  1997,  by and between  UNION  NATIONAL  BANK & TRUST  COMPANY,  a
national banking  association  ("Bank"),  and SPARTA UNION  BANCSHARES,  INC., a
Wisconsin corporation ("SUB").

                                    RECITALS

     The parties  consider it advantageous to form a one-bank  holding  company,
which will be SUB, to own all of the outstanding  stock of the Bank. To form the
holding company,  SUB will organize a wholly-owned  subsidiary bank,  called New
Union  National  Bank & Trust  Company,  a national  banking  association  ("New
Bank").  Bank will then  merge with and into New Bank,  leaving  New Bank as the
survivor,  and  converting the  outstanding  stock of Bank into stock of SUB, so
that the shareholders of Bank will become the shareholders of SUB.

     This  reorganization  is comprised of the  organization of New Bank and the
merger of Bank into New Bank, as the surviving  entity (the "merger").  Pursuant
to the terms of this Agreement, and a Merger Agreement between Bank and New Bank
(to be  executed  after New Bank is  formed),  as of the  Effective  Date of the
Merger,  each of the then issued and  outstanding  shares of Bank  Common  Stock
("Bank  Common")  will  be  converted  into  one  share  of the  authorized  but
previously unissued common stock of SUB ("SUB Common").

     NOW, THEREFORE,  the parties do adopt this plan of reorganization and agree
as follows:

     1. Merger. Subject to compliance with all requirements of law and the terms
and  conditions set forth in this  Agreement,  Bank will be merged with and into
New Bank.

     (a) Effective Date;  Surviving Bank. The Effective Date of this Merger (the
"Effective Date") shall be the date specified in a Merger  Certification  Letter
to be issued by the  Comptroller  of the Currency  (the  "Comptroller").  At the
Effective  Date,  Bank  shall be  merged  with and into New Bank,  the  separate
existence of Bank shall cease and New Bank,  as the surviving  corporation  (the
"Surviving Bank"),  shall succeed to and possess all of the properties,  rights,
privileges, immunities, and powers, and shall be subject to all the liabilities,
obligations, restrictions, and duties, of Bank and New Bank.

     (b) Charter Number. With the consent of the Comptroller, the charter number
of the Bank  prior to the  Effective  Date  shall be the  charter  number of the
Surviving Bank.

     (c) Articles of Incorporation;  Name. From and after the Effective Date and
until  thereafter  amended as provided by law, the Articles of  Incorporation of






the Surviving Bank shall be the Articles of Incorporation of Bank, as amended or
restated, and the name of the Surviving Bank shall be that of Bank.

     (d) Bylaws.  From and after the Effective Date and until thereafter amended
as  provided  by law,  the  Bylaws  of Bank in effect  immediately  prior to the
Effective Date shall constitute the Bylaws of the Surviving Bank.

     (e)  Directors and  Officers.  From and after the Effective  Date and until
their respective  successors are elected,  the members of the Board of Directors
and the officers of the  Surviving  Bank shall  consist of those persons who are
serving as directors and officers of the Bank immediately prior to the Effective
Date.

     (f) Conversion of Stock.  As of the Effective Date, by virtue of the merger
and without any action on the part of the  shareholders of Bank, all of the Bank
Common outstanding  immediately prior to the Effective Date shall cease to exist
and  shall be  converted  into SUB  Common,  at the rate of one (1) share of SUB
Common  for each one (1) share of Bank  Common.  As of the  Effective  Date,  by
virtue of the merger and without any action on the part of the  shareholders  of
New Bank, all of the New Bank common stock outstanding  immediately prior to the
Effective  Date shall cease to exist and shall be  converted  to 4,100 shares of
common stock of the Surviving Bank, $100 par value.

     (g) Transmittal  Procedure.  Bank will close its transfer records on a date
twenty (20) days prior to the Effective  Date for a period through and including
the Effective Date. When the Effective Date is established,  the date of closing
of  transfer  records  will also be set,  and the  shareholders  of Bank will be
notified  of  such.  Bank  will  make  every  reasonable   effort  to  have  its
shareholders of record tender their certificates for Bank Common to the Exchange
Agent at least three (3) days prior to the  Effective  Date.  Bank will serve as
the  Exchange  Agent for this  transaction.  On the  Effective  Date,  SUB shall
provide to Bank,  and Bank shall  mail or  deliver  to its  shareholders,  stock
certificates of SUB Common to which those shareholders are entitled by reason of
the merger; provided, however, that no SUB Common certificate shall be mailed or
delivered to a Bank shareholder who is eligible to exercise  dissenter's  rights
or who has not  delivered to the Bank all  certificates  of Bank Common owned by
such  shareholder (or if a certificate has been lost, an indemnity bond or other
agreement satisfactory to SUB).

     Until so delivered to the Bank, each outstanding certificate which prior to
the  Effective  Date  represented  shares of Bank  Common will be deemed for all
purposes to evidence  only the right to receive the  ownership  of the shares of



                                        2




SUB Common into which such Bank Common has been  converted;  provided,  however,
that until such Bank Common  certificates  are so delivered to Bank, no dividend
payable on SUB Common at any time after the Effective  Date shall be paid to the
holder of such  undelivered  certificate.  Upon the delivery of such certificate
after the Effective Date, SUB shall pay, without interest,  any unpaid dividends
by reason of the preceding sentence to the record holder thereof, and Bank shall
deliver the stock certificate for SUB Common.

     (h) Dissenting  Shares of Bank. If any shares of Bank Common are dissenting
shares,  Bank shall proceed according to applicable law to determine and pay the
fair  value of those  dissenting  shares.  "Dissenting  shares"  shall mean each
outstanding  share of Bank Common as to which the holder has  strictly  complied
with the provisions of applicable law in order effectively to withdraw from Bank
and  obtain  the right to  receive  the  appraised  value of his  shares of Bank
Common.

     As of the  Effective  Date or the date  that the  last  action  is taken to
exercise  dissenter's  rights,  whichever is later,  dissenting shares shall, by
virtue of the merger,  cease to represent  any  ownership  interest or ownership
rights to the Bank or SUB, and shall be converted into the right to receive fair
value of those shares as provided by law.

     (i)  Business.  From and after the  Effective  Date,  the  business  of the
Surviving Bank shall be that of a national banking association, conducted at the
offices of Bank where located immediately prior to the Effective Date.

     (j)  Assets  and  Liabilities.  From and  after  the  Effective  Date,  the
Surviving Bank shall be liable for all liabilities of New Bank and Bank; and all
deposits, debts, liabilities,  and contracts of New Bank and Bank, respectively,
matured or unmatured,  whether accrued,  absolute,  contingent or otherwise, and
whether or not reflected or reserved against on balance sheets, books of account
or records of New Bank or Bank,  shall be those of the Surviving  Bank and shall
not be released or impaired by reason of the merger; and all rights of creditors
and other obligees and all liens on property of either New Bank or Bank shall be
preserved unimpaired.  Further, all rights, franchises and interests of New Bank
and Bank,  respectively,  in and to every type of property  (real,  personal and
mixed) and choices in action shall be transferred to and vested in the Surviving
Bank by  virtue  of such  merger  without  any deed or other  transfer,  and the
Surviving  Bank,  without any order or other  action on the part of any court or
otherwise,  shall  hold  and  enjoy  all  rights  of  property,  franchises  and
interests,  including appointments,  designations and nominations, and all other
rights and interests in every fiduciary capacity,  in the same manner and to the



                                        3




same extent as such rights, franchises and interests were held or enjoyed by New
Bank and Bank, respectively, on the Effective Date.

     (k) Tax  Consequences.  The parties intend and desire that the merger shall
be treated for income tax purposes as a forward  triangular merger under Section
368(a)(1)(A) and Section  368(a)(2)(D) of the Internal Revenue Code. The parties
shall act in all respects consistently with that intent.

     (l) Shareholder  Approvals.  This Agreement and Plan of Reorganization will
be  submitted  to  the  respective   shareholders  of  Bank  and  New  Bank  for
ratification and  confirmation at shareholder  meetings to be called and held in
accordance with the applicable  provisions of law and the respective Articles of
Incorporation and Bylaws of Bank and New Bank. Each shareholder meeting shall be
called  as  soon  as  reasonably  possible.  Bank  and  New  Bank  will  proceed
expeditiously  and cooperate  fully in the procurement of any other consents and
approvals and in the taking of any other  action,  and the  satisfaction  of all
other requirements prescribed by law or otherwise, necessary for consummation of
the merger.  SUB, as sole  shareholder of New Bank,  shall vote its stock in New
Bank to approve the merger and the transactions set forth in this Agreement.

     (m) Regulatory  Approvals.  The parties shall prepare and submit for filing
any and all applications, filings, and registrations with, and notifications to,
all federal and state  authorities  required for the merger to be consummated as
contemplated  by this Agreement.  Thereafter,  the parties shall pursue all such
applications,  filings, registrations,  and notifications diligently and in good
faith, and shall file such supplements,  amendments,  and additional information
in  connection  therewith as may be  reasonably  necessary  for the merger to be
consummated.

     (n) Merger Agreement.  SUB shall form New Bank promptly following execution
of this  Agreement  and shall  cause New Bank to execute  the  Merger  Agreement
attached  hereto as Exhibit A. Within  three days after  execution  by New Bank,
Bank shall execute the Merger Agreement.

     2.  Representations and Warranties by Bank. Bank represents and warrants to
SUB that this Agreement has been approved by the Board of Directors of Bank, and
upon  approval  by the  shareholders  of Bank  will be fully  authorized  by all
necessary corporation action.

     3.  Representations  and  Warranties by SUB. SUB represents and warrants to
Bank that the shares of SUB Common to be delivered to Bank shareholders pursuant
to this Agreement will, upon issuance, be duly and validly authorized and issued



                                        4




and fully paid and nonassessable voting shares,  except as otherwise required by
law, and will constitute all of the issued and  outstanding  shares of SUB as of
the Effective Date.

     4. Closing. Subject to the satisfaction of all closing conditions contained
herein or their waiver,  the closing shall occur on the  Effective  Date,  which
will be within  thirty  (30) days  after the  satisfaction  of the last  closing
condition. The Closing shall take place at the offices of Bank, or at such other
place as SUB and Bank may hereafter agree.

     5. Conditions to Obligations of Both Parties.

     The  obligations  of each party to be performed on the Effective Date shall
be subject to the following conditions:

     (a)  Regulatory Approval.  On or before the Effective Date, Bank shall have
received the  approval  from those  regulatory  agencies  whose  approval of the
merger is required and any  mandatory  waiting  period(s)  associated  with such
approval(s) shall have expired.

     (b)  No Litigation.  At the Effective  Date, no litigation or  governmental
investigation  shall have been  commenced  or, to the best  knowledge  of SUB or
Bank, threatened or proposed, which would have a material, adverse effect on the
value of Bank or an  adverse  effect on the  ability  of any party to close this
transaction, or which arises out of or concerns the transactions contemplated by
this Agreement.

     (c) Closing Not Later Than March 31, 1998. The closing of the  transactions
contemplated  hereunder shall have occurred on or before March 31, 1998,  unless
such date is extended by mutual written agreement of the parties.

     (d)  Shareholder  Approval.  This  Agreement  shall have been  approved and
adopted by the  shareholders  of Bank and of New Bank in such manner as required
by law.

     (e) Tax Opinion.  The parties shall have received a written  opinion of tax
counsel that the  transactions  contemplated  by this  Agreement  and the Merger
Agreement  will  constitute a tax-free  reorganization  under the  provisions of
Sections 368(a)(1)(A) and 368(a)(2)(D) of the Internal Revenue Code with respect
to those shareholders of Bank who will receive SUB Common in the merger.

     (f)  Securities  Law  Compliance.  The SUB Common stock to be issued in the
merger shall have been  registered,  qualified or exempted  under all applicable
federal  and state  securities  laws,  and there  shall  have been no stop order



                                        5




issued or threatened by the SEC or any state that suspends the  effectiveness of
any such registration, qualification, or exemption.

     6.  Conditions to Obligations  of SUB and New Bank. The  obligations of SUB
and New Bank to be  performed  on the  Effective  Date  shall be  subject to the
following conditions:

     (a)  Representations   and  Warranties  True;   Covenants  and  Obligations
Performed.  All representations and warranties of Bank shall be true and correct
in all material  respects on the Effective  Date,  and Bank shall have performed
all acts required of it under the terms of this Agreement.

     (b)  Dissenting  Shares.  There shall be not more than five percent (5%) of
the total outstanding  shares of Bank that as of the Effective Date are eligible
to elect  dissenter's  rights by reason of having  complied with the  procedures
required by applicable law.

     (c) No Material  Adverse  Change.  The  assets,  business,  operation,  and
prospects of Bank shall not have been  materially  and  adversely  affected by a
loss or  destruction  not fully  compensated by insurance,  by any  governmental
proceeding  or  action,  or by any  other  event  or  occurrence,  which  in the
reasonable  judgment  of SUB  would  defeat or  frustrate  the  purposes  of the
reorganization or otherwise make the reorganization undesirable.

     7.  Conditions  to  Obligations  of  Bank.  The  obligations  of Bank to be
performed on the Effective  Date shall be subject to the  following  conditions:
All  representations  and  warranties  of SUB shall be true and  correct  in all
material  respects  on the  Effective  Date,  and SUB and New  Bank  shall  have
performed all acts required of them under the terms of this Agreement.

     8. Additional Covenants of the Parties.

     (a) Cooperation. The parties will fully cooperate with each other and their
respective  counsels and accountants in connection with any steps to be taken as
part of their  obligations under this Agreement,  including without  limitation,
the  preparation  of financial  statements  and the supplying of  information in
connection with the preparation of regulatory applications.

     (b) Expenses. All costs and expenses and charges incurred by a party hereto
shall be borne by such party, including the fees of their respective accountants
and attorneys;  provided, however, that if the merger is not consummated for any
reason,  all costs and  expenses  incurred  by SUB and New Bank shall be paid by
Bank.



                                        6




     9.  Termination.  This Agreement and merger may be terminated and abandoned
upon  prompt  written  notice to the other  party  before  the  Effective  Date,
notwithstanding authorization and adoption of this Agreement by the shareholders
of one or both of Bank and New Bank:

     (a) By mutual consent of Bank and SUB through their Boards of Directors;

     (b) By Bank at any time after March 31, 1998,  (or such later date as shall
have been agreed to in writing by the parties) if any of the conditions provided
for in Paragraphs 5 or 7 of this  Agreement  have not been met and have not been
waived in writing by Bank; or

     (c) By SUB at any time  after  March 31,  1998 (or such later date as shall
have been agreed to in writing by the parties) if any of the conditions provided
for in Paragraphs 5 or 6 of this  Agreement  have not been met and have not been
waived in writing by SUB.

     10. Miscellaneous.

     (a)  Assignment.  This  Agreement and the rights,  interests,  and benefits
hereunder shall not be assigned,  transferred,  or pledged in any way, and shall
not be subject to  execution,  attachment,  or similar  process.  Any attempt to
assign, transfer,  pledge, or make any other disposition of this Agreement or of
the rights,  interests, and benefits contrary to the foregoing provision, or the
levy of any attachment or similar process thereupon,  shall be null and void and
without effect.

     (b)  Waiver.  No failure or delay of any party in  exercising  any right or
power given to it under this  Agreement  shall operate as a waiver  thereof.  No
waiver of any breach of any  provision  of this  Agreement  shall  constitute  a
waiver of any prior,  concurrent,  or subsequent breach. No waiver of any breach
or  modification  of this  Agreement  shall be effective  unless  contained in a
writing executed by both parties.

     (c) Entire Agreement.  This Agreement supersedes any other  representations
or agreement,  whether  written or oral, that may have been made or entered into
by SUB, Bank, New Bank or by any officer or officers of such parties relating to
the  acquisition  of Bank,  or its assets or business,  by SUB.  This  Agreement
constitutes the entire agreement by the parties,  and there are no agreements or
commitments except as set forth herein.



                                        7




     (d) Amendment.  This Agreement may be modified or amended only by a written
agreement executed by duly authorized officers of both parties.

     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Agreement to be
duly executed as of the date and year first above written.

ATTEST:                                 UNION NATIONAL BANK & TRUST COMPANY


_______________________                 By:________________________________



ATTEST:                                 SPARTA UNION BANCSHARES, INC.


_______________________                 By:________________________________




                                        8



                                    EXHIBIT A

                                MERGER AGREEMENT


     MERGER   AGREEMENT   ("Merger   Agreement")   made   this   _____   day  of
____________________,  1997,  by and  between  Union  National  Bank & Trust,  a
national  banking  association  ("Bank"),  and New Union  National  Bank & Trust
Company, a national banking association ("New Bank").

                                   WITNESSETH

     WHEREAS,  Bank and Sparta Union Bancshares,  Inc. ("SUB") have entered into
an  Agreement  and  Plan  of   Reorganization   dated   ________________,   1997
("Agreement"),  pursuant  to which  Bank has agreed to merge with and into SUB's
wholly-owned subsidiary, New Bank, in a forward triangular merger; and

     WHEREAS,  Bank and New Bank  wish to agree on the terms of the  merger  now
that New Bank has been formed;

     NOW, THEREFORE, the parties agree as follows:

     1. Incorporation of Plan of Reorganization. The terms and conditions of the
Agreement are  incorporated  herein by reference in their  entirety,  and made a
part of this  Merger  Agreement  with the same  effect as if New Bank had been a
party to the Agreement.

     2.  Cooperation.  New Bank  shall  cooperate  with Bank to achieve a prompt
consummation  of the  transactions  contemplated  in the  Agreement,  and  shall
perform all actions  necessary  or  convenient  to be  performed  by it for that
purpose.

     3.  Articles of  Association.  Effective  as of the time this merger  shall
become  effective as specified in the Agreement,  the articles of association of
that bank  resulting  from the  merger of Bank and New Bank  shall read in their
entirety as stated in the attached Articles of Association.

     4. Capital Stock. The amount of capital stock of New Bank shall be $50,000,
divided into 500 shares of common stock, each of $100 par value. At the time the
merger shall become  effective  (and after the temporary  capitalization  of the
interim bank has been returned to SUB),  the resulting  bank shall have $410,000
in capital, a surplus of $2,000, and undivided profits of $6,257,047,  adjusted,
however,  for earnings and expenses  between  January 1, 1996, and the effective
date of the  merger.  At the time the merger  shall  become  effective,  the 500



                                        9




shares of New Bank stock then outstanding  shall be converted into 3,869 shares,
each of $100 par value, of the resulting bank.

     IN WITNESS  WHEREOF,  the parties have  executed  this Merger  Agreement by
their proper corporate officers duly authorized to execute this Agreement, as of
the date first above written.

Attest:                               UNION NATIONAL BANK & TRUST COMPANY


_________________________             By_________________________________



Attest:                               NEW UNION NATIONAL BANK & TRUST COMPANY


_________________________             By_________________________________






                                       10




                                    EXHIBIT B

                  TAX OPINION OF BOARDMAN, SUHR, CURRY & FIELD







                                                             _____________, 1997



The Board of Directors
Sparta Union Bancshares, Inc.
124 West Oak Street
Sparta, WI  54656

The Board of Directors
Union National Bank & Trust Co.
124 West Oak Street
Sparta, WI  54656

Gentlemen:

     You have requested that we render an opinion as to the tax  consequences to
Sparta Union Bancshares,  Inc. ("Holding Company"),  Union National Bank & Trust
Co.  ("Bank"),  New  Union  National  Bank & Trust  Co.  ("New  Bank"),  and the
shareholders  ("Shareholders")  of the  Bank  in  connection  with  a  corporate
reorganization to form a one-bank holding company,  as described in an Agreement
and Plan of  Reorganization  dated  _____________,  1997,  between  the  Holding
Company and the Bank ("Agreement") and in a certain  Prospectus/Proxy  Statement
dated __________________.

     We  acknowledge  that this opinion is provided for the benefit and guidance
of the  Shareholders  as well as for the  benefit  and  guidance  of the Holding
Company and the Bank.

     In  making   this   opinion,   we  have  relied  on  the   Agreement,   the
Prospectus/Proxy Statement, and the Merger Agreement (to be executed between the
Bank and the New Bank),  and on the truth and  completeness  of the  warranties,
representations,  statements,  and facts contained in those  documents.  We have
also relied upon the truth and completeness of the following  representations of
the Holding Company and the Bank:

     1.  The  fair  market  value  of  the  Holding   Company  stock  and  other
consideration  received by each Bank shareholder will be approximately  equal to
the fair market value of the Bank stock surrendered in the exchange.

     2.  There  is no plan or  intention  by the Bank  shareholders  who own one
percent (1%) or more of the Bank stock,  and to the best of the knowledge of the
management  of the  Bank,  there  is no plan  or  intention  on the  part of the
remaining Bank shareholders to sell, exchange,  or otherwise dispose of a number
of shares of Holding Company stock received in the transaction that would reduce
the Bank shareholders'  ownership of Holding Company stock to a number of shares
having a value,  as of the date of the  transaction,  of less than fifty percent
(50%) of the value of all of the formerly  outstanding Bank stock as of the same
date.  For purposes of the  representation,  shares of Bank stock  exchanged for






__________________, 1997
Page 2


cash or other property, surrendered by dissenters, or exchanged for cash in lieu
of fractional  shares of Holding  Company  stock will be treated as  outstanding
Bank stock on the date of the  transaction.  Moreover,  shares of Bank stock and
shares of Holding  Company stock held by Bank  shareholders  and otherwise sold,
redeemed  or  disposed  of  prior  or  subsequent  to the  transaction  will  be
considered in making this representation.

     3. New Union  National Bank & Trust Company ("New Bank"),  as the surviving
corporation, will acquire at least ninety percent (90%) of the fair market value
of the net assets and at least seventy percent (70%) of the fair market value of
the gross  assets held by the Bank  immediately  prior to the  transaction.  For
purposes of this representation, amounts paid by the Bank to dissenters, amounts
paid by the Bank to shareholders who receive cash or other property, Bank assets
used to pay its reorganization  expenses,  and all redemptions and distributions
(except  for  normal  dividends)  made by the  Bank  immediately  preceding  the
transfer  will be  included  as  assets  of the  Bank  immediately  prior to the
transaction.

     4. Prior to the transaction,  the Holding Company will be in control of the
New Bank within the meaning of I.R.C. sections 368(c).

     5. Following the transaction, the New Bank will not issue additional shares
of its stock that would result in the Holding  Company losing control of the New
Bank within the meaning of I.R.C. sections 368(c).

     6. The Holding  Company has no plan or intention  to  reacquire  any of its
stock issued in the transaction.

     7. The Holding  Company has no plan or intention to liquidate the New Bank,
to merge  the New Bank with and into  another  bank or  corporation,  to sell or
otherwise dispose of the stock of the New Bank, or to cause the New Bank to sell
or otherwise  dispose of any of the Bank's assets  acquired in the  transaction,
except for  dispositions  made in the  ordinary  course of business or transfers
described in I.R.C. sections 368(a)(2)(c).

     8. The  liabilities of the Bank assumed by the New Bank and the liabilities
to which the  transferred  assets of the Bank are subject,  were incurred in the
ordinary course of Bank's business.

     9.  Following  the  transaction,  the New Bank will  continue  the historic
business of the Bank or use a significant portion of Bank's business assets in a
business.

     10. The Holding Company,  Bank, New Bank, and the Bank's  shareholders will
pay  their  respective  expenses,  if  any,  incurred  in  connection  with  the
transaction.






__________________, 1997
Page 3


     11. There is no  intercorporate  indebtedness  existing between the Holding
Company  and the Bank or  between  the New Bank and the Bank  which was  issued,
acquired or will be settled at a discount.

     12. No two parties to the transaction  are investment  companies as defined
in I.R.C. sections 368(1)(2)(F)(iii) and (iv).

     13.  The  Bank is not  under  the  jurisdiction  of a court  in a Title  11
(bankruptcy) or similar case.

     14. The fair market value of the assets of the Bank  transferred to the New
Bank will  equal or exceed the sum of the  liabilities  assumed by the New Bank,
plus the liabilities, if any, to which the transferred assets are subject.

     15. No stock of New Bank will be issued in the transaction.

     We have not undertaken to verify  independently  any of the factual matters
upon which we rely in providing this opinion.  Moreover, we have assumed that no
changes  have  occurred or will occur with  respect to the  documents  described
above or the representations set forth in numbers 1 through 15 above.

     Based upon and subject to the  foregoing,  legal  counsel is of the opinion
that, for federal and State of Wisconsin income purposes:

          (1)  The proposed merger will constitute a  reorganization  within the
               meaning  of   sections   368(a)(1)(A)   by  reason  of   sections
               368(a)(2)(D)  of the Internal  Revenue Code of 1986,  as amended,
               and Chapter 71 of the Wisconsin Statutes. The reorganization will
               not be  disqualified  by reason of the fact that Holding  Company
               common stock is used in the transaction.  (Internal  Revenue Code
               Section 368(a)(2)(D).)

          (2)  No gain or loss will be recognized to the Bank on the transfer of
               substantially  all of its assets to the New Bank in exchange  for
               Holding  Company  common stock and the assumption by the New Bank
               of the liabilities of the Bank.

          (3)  No gain or loss will be recognized to the Holding  Company or the
               New Bank upon the receipt by the New Bank of substantially all of
               the assets of the Bank in exchange for the Holding Company common
               stock and the  assumption by the New Bank of the  liabilities  of
               the Bank.

          (4)  The basis of the Bank assets in the hands of the New Bank will be
               the same as the  basis of those  assets  in the hands of the Bank
               immediately prior to the proposed transaction.





__________________, 1997
Page 4


          (5)  The holding  period of the assets of the Bank in the hands of the
               New Bank will  include the period  during  which such assets were
               held by the Bank.

          (6)  The  basis of the New  Bank  stock  in the  hands of the  Holding
               Company  will be increased by an amount equal to the basis of the
               Bank assets acquired by the New Bank in the transaction, and will
               be decreased by the amount of  liabilities of the Bank assumed by
               the New Bank and the amount of  liabilities to which the acquired
               assets of the Bank are subject.

          (7)  No gain or loss will be  recognized  by the  shareholders  on the
               exchange of their Bank common  stock for Holding  Company  common
               stock;  provided,  however,  that no  opinion is  expressed  with
               respect to Bank shareholders who dissent from the transaction and
               receive cash for their Bank stock.

          (8)  The income tax basis of the Holding  Company  common  stock to be
               received by the shareholders will be the same as the basis of the
               Bank common stock surrendered in exchange.

          (9)  The holding  period of the  Holding  Company  common  stock to be
               received by the shareholders will include the period during which
               the Bank common stock surrendered in exchange was held,  provided
               that the Bank common stock is held as a capital asset on the date
               of the exchange.

     Our  opinion is limited to the  specific  issues  addressed.  We express no
opinion and make no  representation,  and no  inference is intended or should be
drawn from any  statement in this letter,  as to any other issues  involving the
transaction.


                                      BOARDMAN, SUHR, CURRY & FIELD






                                    EXHIBIT C

                           UNITED STATES CODE SECTIONS








National Banks                                              12 USCS Section 215a

(b)  Dissenting  shareholders.  If a merger  shall be  voted  for at the  called
meetings by the necessary  majorities of the shareholders of each association or
State bank  participating in the plan of merger, and thereafter the merger shall
be approved by the Comptroller, any shareholder of any association or State bank
to be merged into the receiving association who has voted against such merger at
the  meeting of the  association  or bank of which he is a  stockholder,  or has
given  notice in writing at or prior to such  meeting to the  presiding  officer
that he dissents from the plan of merger, shall be entitled to receive the value
of the  shares  so held  by him  when  such  merger  shall  be  approved  by the
Comptroller  upon written request made to the receiving  association at any time
before thirty days after the date of consummation of the merger,  accompanied by
the surrender of his stock certificates.

(c) Valuation of shares.  The value of the shares of any dissenting  shareholder
shall be  ascertained,  as of the effective date of the merger,  by an appraisal
made by a committee of three  persons,  composed of (1) one selected by the vote
of the holders of the majority of the stock, the owners of which are entitled to
payment in cash; (2) one selected by the directors of the receiving association;
and (3) one selected by the two so selected.  The  valuation  agreed upon by any
two of the three  appraisers  shall  govern.  If the value so fixed shall not be
satisfactory  to any  dissenting  shareholder  who has requested  payment,  that
shareholder may, within five days after being notified of the appraised value of
his shares, appeal to the Comptroller,  who shall cause a reappraisal to be made
which shall be final and binding as to the value of the shares of the appellant.

(d)  Application  to  shareholders   of  merging   associations:   Appraisal  by
Comptroller; expenses of receiving association; sale and resale of shares; State
appraisal and merger law. If,  within ninety days from the date of  consummation
of the merger,  for any reason one or more of the  appraisers is not selected as
herein  provided,  or the appraisers fail to determine the value of such shares,
the  Comptroller  shall upon written  request of any  interested  party cause an
appraisal  to be made  which  shall be final and  binding  on all  parties.  The
expenses of the Comptroller in making the  reappraisal or the appraisal,  as the
case may be, shall be paid by the receiving association. The value of the shares
ascertained  shall  be  promptly  paid  to the  dissenting  shareholders  by the
receiving  association.  The shares of stock of the receiving  association which
would have been delivered to such dissenting shareholders had they not requested
payment  shall be sold by the  receiving  association  at an  advertised  public
auction,  and the receiving  association shall have the right to purchase any of
such shares at such public auction,  if it is the highest bidder  therefor,  for
the purpose of  reselling  such shares  within  thirty days  thereafter  to such
person or persons and at such price not less than par as its board of  directors
by resolution may determine. If the shares are sold at public auction at a price
greater than the amount paid to the dissenting shareholders,  the excess in such
sale price shall be paid to such dissenting shareholders.  The appraisal of such
shares of stock in any State bank shall be determined  in the manner  prescribed
by the law of the State in such cases,  rather than as provided in this section,
if such  provision  is made in the State  law;  and no such  merger  shall be in
contravention of the law of the State under which such bank is incorporated. The
provision  of this  subsection  shall apply only to  shareholders  of (and stock
owned  by  them  in) a bank or  association  being  merged  into  the  receiving
association.





                                    EXHIBIT D

                          ARTICLES OF INCORPORATION OF
                          SPARTA UNION BANCSHARES, INC.




                            ARTICLES OF INCORPORATION
                               Stock (for profit)


     Executed  by the  undersigned  for  the  purpose  of  forming  a  Wisconsin
for-profit  corporation under Chapter 180 of the Wisconsin Statutes repealed and
recreated by 1989 Wis. Act 303:

     ARTICLE 1. Name of Corporation: Sparta Union Bancshares, Inc.

     ARTICLE 2. The Corporation shall be authorized to issue 9,000 shares.

     ARTICLE 3. The street address of the initial registered office is: 124 West
Oak Street, Sparta, Wisconsin 54656

     ARTICLE 4. The name of the initial registered agent at the above registered
office is: John J. Sund, Jr.

     ARTICLE 5. Other provisions (OPTIONAL): See Article 5A attached to and made
a part of these Articles of Incorporation. See Article 5B attached to and made a
part of these Articles of Incorporation.

     ARTICLE 6. Executed on February 28, 1996.

     Name and complete address of each incorporator:

          John E. Knight
          BOARDMAN,  SUHR,  CURRY & FIELD
          Firstar  Plaza,  Suite 410
          1 South Pinckney Street
          Madison, WI 53703


                                            /s/ John E. Knight
                                            --------------------------------
                                            (Incorporator Signature)


This document was drafted by John E. Knight.


DFI CORP FILE ID NO. S048786
Document stamped Received February 28, 1996, 3:30 P.M. by State of
Wisconsin, Department of Financial Institutions.
Document stamped Filed March 5, 1996, by State of Wisconsin,
Department of Financial Institutions.






                          SPARTA UNION BANCSHARES, INC.

                            ARTICLES OF INCORPORATION


     ARTICLE 5A: Except as provided  below,  shareholders  of the  Corporation's
capital stock (the "Stock") may not sell, transfer,  assign,  encumber,  pledge,
hypothecate,  or in any way  dispose of or alienate  any of their  shares of the
Stock,  or any right,  title or  interest  therein,  whether  voluntarily  or by
operation of law, or by gift or otherwise,  without the prior written consent of
the  Corporation.  Provided,  however,  that the prior  written  consent  of the
Corporation  shall  not be  required  as  to:  (i)  any  transaction  between  a
shareholder  and his or her spouse,  a member of his or her immediate  family or
any lineal descendant  thereof; or (ii) any pledge or hypothecation of shares of
the Stock,  provided,  that as a condition  precedent  to the  effectiveness  of
either of the  transactions  described in (i) or (ii) herein,  the transferee in
any such  transaction  shall be bound by all of the terms and conditions of this
Article 5A.

     In the event a shareholder (the "Selling Shareholder"),  desires to dispose
of his or her  shares  of the  Stock,  or  any  portion  thereof  (the  "Offered
Shares"),  other  than in a  transaction  of the type  described  in (i) or (ii)
above,  without first  obtaining  the written  consent of the  Corporation,  the
Selling Shareholder,  first, shall give the Corporation written notice of his or
her intent to do so, stating therein the identity of the proposed  transferee of
the  Offered  Shares,  the number of  Offered  Shares  the  Selling  Shareholder
proposes to transfer,  the proposed consideration for the Offered Shares and the
other terms and conditions of the proposed  transfer of the Offered Shares.  The
Corporation  shall have a right of first  refusal to acquire  all,  but not less
than all, of the Offered Shares for the consideration and on the other terms and
conditions  offered by the proposed  transferee  and as contained in the written
notice given to the  Corporation  by the Selling  Shareholder.  The  Corporation
shall  exercise its right to acquire the Offered Shares by giving written notice
to the  Selling  Shareholder,  indicating  the number of Offered  Shares it will
acquire,  within thirty (30) days following receipt of the written notice of the
Selling  Shareholder.  In the  event  the  Corporation  does  not  exercise  its
acquisition rights within the time period as provided herein with respect to all
of the Offered  Shares,  the Selling  Shareholder  shall be free for a period of
thirty  (30)  days  thereafter  to  transfer  all of the  Offered  Shares to the
transferee  identified  in the written  notice to the  Corporation,  at the same
consideration  and on the same terms and conditions as set forth in such written
notice.  After giving any notice of intended transfer of any shares of the Stock
pursuant  to this  Article  5A,  the  Selling  Shareholder  shall  refrain  from
participating  as an officer,  director or shareholder of the  Corporation  with
respect to the  Corporation's  decision on whether or not to acquire the Offered
Shares unless requested by the other  shareholders of the Corporation  holding a
majority of the Corporation's outstanding shares of capital stock, not including
the shares of the Stock held by the Selling Shareholder; and, if so requested to
participate, the Selling Shareholder shall cooperate with the other shareholders
and the  Corporation  in every  reasonable way to effectuate the purpose of this
Article 5A. Except as provided in this Article 5A, the Selling Shareholder shall
be bound by the  restrictions  and limitations  imposed by this Article 5A after
any notice of a desire to transfer is given and whether or not any such transfer
actually occurs. As a condition precedent to the effectiveness of any transfer






of Offered  Shares to any  person or  entity,  such  transferee  shall  agree in
writing to be bound by all of the terms and conditions of this Article 5A.

     Each  certificate  representing  shares of the Stock  shall  have  endorsed
thereon a legend in substantially the following form:

          The shares represented by this certificate and any sale, transfer,  or
          other  disposition  thereof  are  restricted  under and subject to the
          terms and  conditions  contained  in Article  5A of the  Corporation's
          Articles of  Incorporation,  a copy of which is on file at the offices
          of the Corporation.

     Any attempted or purported sale, transfer, assignment, encumbrance, pledge,
hypothecation  or other  disposition  or  alienation of any of the shares of the
Stock by a shareholder  in violation of this Article 5A shall be null,  void and
ineffectual,  and shall not  operate to  transfer  any right,  title or interest
whatsoever in or to such shares of the Stock.

     The  provisions of this Article 5A may not be amended,  altered or repealed
except by the affirmative  vote of the holders of at least  two-thirds  (2/3) of
the shares of the capital stock of the  Corporation  issued and  outstanding and
entitled  to vote,  at any  regular or special  meeting of the  shareholders  if
notice of the  proposed  amendment,  alteration  or repeal is  contained  in the
notice of the meeting.

     ARTICLE 5B: The initial directors of the Corporation are:

          Eugene A. Arenz                      J. David Rice
          Route #2                             603 North Water
          Sparta, WI  54656                    Sparta, WI  54656

          Gary Edwards                         John J. Sund, Jr.
          421 Highland Meadows Dr.             644 Teena Street
          Sparta, WI  54656                    Sparta, WI  54656

          Donald L. Goodman                    John R. Wall
          210 Grove Street                     1012 N. Fairway Drive
          Sparta, WI  54656                    Sparta, WI  54656

          Sherwin Giraud
          Route #2
          Sparta, WI  54656



                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS


Item 20.  Indemnification of Officers and Directors.

     Sections 180.0850 through 180.0859 of the Wisconsin  Statutes permit and in
some cases require indemnification of directors, officers, employees, and agents
of a Wisconsin corporation.  In general, such indemnification is required unless
the person  violates a duty of  loyalty  or a duty of care as  specifically  set
forth in the statutes. Section 180.0851, Wis. Stats.

     Article  VII of the  registrant's  Bylaws  provide for  indemnification  of
officers and  directors  under terms and  conditions  that follow the  statutory
language  cited  above.  A complete  copy of the Bylaws is included in Exhibit 3
hereto.

Item 21.  Exhibits and Financial Statement.

     Schedules

     (a) Exhibits. The following exhibits are submitted:

         Exhibit No.                        Description

             2             Agreement  and  Plan  of  Reorganization  (set  forth
                           as an exhibit to the Prospectus)

             3             Articles of Incorporation (set forth as an exhibit to
                           the Prospectus) and Bylaws of Sparta Union 
                           Bancshares, Inc.

             4             Specimen stock certificate of Sparta Union 
                           Bancshares, Inc.

             5             Opinion of Boardman, Suhr, Curry & Field

             8             Tax Opinion of Boardman, Suhr, Curry & Field (set 
                           forth as an exhibit to the Prospectus)

            24             Consent of Boardman, Suhr, Curry & Field (included in
                           opinion)

            28             Form of Proxy for shareholders of Union National Bank
                           & Trust Company

            (b)            No financial statement schedules are required to be 
                           filed with regard to Sparta Union Bancshares, Inc. 
                           or Union National Bank & Trust Company.







Item 22.  Undertakings.

     (1) The registrant will file, during any period in which it offers or sells
securities, a post-effective amendment to this registration statement to:

          (i)  Include  any  prospectus  required  by  sections  10(a)(3) of the
     Securities Act of 1933, as amended ("Act");

          (ii) Reflect in the  prospectus  any facts or events arising after the
     effective  date  of  the   registration   statement  (or  the  most  recent
     post-effective   amendment   thereof)  which,   individually  or  together,
     represent  a  fundamental  change in the  information  in the  registration
     statement; and

          (iii) Include any  additional or changed  material  information on the
     plan of distribution.

     (2) For determining liability under the Act, the registrant will treat each
post-effective  amendment  as a new  registration  statement  of the  securities
offered,  and the offering of the securities at that time to be the initial bona
fide offering.

     (3) The  registrant  will file a  post-effective  amendment  to remove from
registration  any  of the  securities  that  remain  unsold  at  the  end of the
offering.

     (4) The undersigned registrant hereby undertakes to respond to requests for
information  that is incorporated  by reference into the prospectus  pursuant to
Items 4, 10(b),  11 or 13 of this Form,  within one  business  day of receipt of
such  request,  and to send the  incorporated  documents  by first class mail or
other equally  prompt means.  This includes  information  contained in documents
filed subsequent to the effective date of the registration statement through the
date of responding to the request.

     (5) The undersigned  registrant  hereby  undertakes to supply by means of a
post-effective  amendment  all  information  concerning a  transaction,  and the
company  being  acquired  involved  therein,  that  was not the  subject  of and
included in the registration statement when it became effective.

     (6) Insofar as indemnification for liabilities arising under the Act may be
permitted to  directors,  officers  and  controlling  persons of the  registrant
pursuant to the foregoing  provisions,  or otherwise,  the  registrant  has been
advised that in the opinion of the SEC such  indemnification  is against  public
policy as expressed in the Act and is,  therefore,  unenforceable.  In the event
that a claim for indemnification  against liability arising under the Act (other
than the payment by the  registrant of expenses  incurred or paid by a director,
officer or controlling person of the registrant in the successful defense of any
action, suit or proceeding) is asserted by such director, officer or controlling



                                        2




person in connection with the securities being registered,  the registrant will,
unless in the opinion of its counsel the matter has been settled by  controlling
precedent,  submit to a court of appropriate  jurisdiction  the question whether
such  indemnification by it is against public policy as expressed in the Act and
will be governed by the final adjudication of such issue.

     (7) The registrant will:

          (i) For determining any liability under the Act, treat the information
     omitted  from the  form of  prospectus  filed as part of this  registration
     statement in reliance  upon Rule 430A and contained in a form of prospectus
     filed by the small  business  issuer under Rule  424(b)(1) or (4) or 497(h)
     under  the Act as part of this  registration  statement  as of the time the
     Commission declared it effective; and

          (ii)  For   determining  any  liability  under  the  Act,  treat  each
     post-effective  amendment  that  contains  a form  of  prospectus  as a new
     registration  statement  for the  securities  offered  in the  registration
     statement,  and that offering of the securities at that time as the initial
     bona fide offering of those securities.



                                        3




                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the Registrant
has duly caused this  Registration  Statement  No.  ________ to be signed on its
behalf by the  undersigned,  thereunto duly  authorized,  in the Town of Sparta,
State of Wisconsin, on the ____ day of _____________, 1997.

                                       SPARTA UNION BANCSHARES, INC.
                                       By:


                                       /s/ John J. Sund, Jr.
                                       ------------------------------------
                                       John J. Sund, Jr., President

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement No. ________ has been signed by the following persons in
the capacities and on the dates indicated.

     Signature                  Title(s)                           Date


/s/ Eugene A. Arenz               Dir.                      ______________, 1997
- ----------------------------
Eugene A. Arenz


/s/ Gary Edwards                  Dir.                      ______________, 1997
- ----------------------------
Gary Edwards


/s/ Sherwin Giraud                Dir.                      ______________, 1997
- ----------------------------
Sherwin Giraud


/s/ Donald L. Goodman             Dir.                      ______________, 1997
- ----------------------------
Donald L. Goodman


/s/ J. David Rice                 Dir.                      ______________, 1997
- ----------------------------
J. David Rice


/s/ John J. Sund, Jr.             Dir., Pres.               ______________, 1997
- --------------------------------
John J. Sund, Jr.


/s/ Karl Wall                     Sec.                      ______________, 1997
- --------------------------------
Karl Wall


                                        4




                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   ----------

                                    FORM S-4

                             REGISTRATION STATEMENT

                                      Under

                           The Securities Act of 1933



                                   ----------



                          SPARTA UNION BANCSHARES, INC.
             (Exact name of registrant as specified in its charter)




                                 E X H I B I T S



                              [PREVIOUSLY PROVIDED]





                                INDEX TO EXHIBITS



Exhibit No.                                Description
   2            Agreement and Plan of Reorganization (set forth as an exhibit to
                the Prospectus)

   3            Articles of Incorporation (set forth as an exhibit to the Pros-
                pectus) and Bylaws of Sparta Union Bancshares, Inc.

   4            Specimen stock certificate of Sparta Union Bancshares, Inc.

   5            Opinion of Boardman, Suhr, Curry & Field

   8            Tax Opinion of Boardman, Suhr, Curry & Field (set forth as an
                exhibit to the Prospectus)

  24            Consent of Boardman, Suhr, Curry & Field (included in opinion)

  99            Form of Proxy for shareholders of Union National Bank & Trust
                Company