REGISTRATION RIGHTS AGREEMENT

among

FMC CORPORATION,

HARSCO DEFENSE HOLDING, INC.

and

UNITED DEFENSE, L.P.

Dated as of January 1, 1994

REGISTRATION RIGHTS AGREEMENT

THIS AGREEMENT is made as of January 1, 1994, by and among FMC 
Corporation, a Delaware corporation ("FMC"), Harsco Defense Holding, 
Inc., a Delaware corporation ("Harsco L.P.") and United Defense, L.P., a 
Delaware limited partnership ("UD").

FMC and Harsco L.P. desire to form UD pursuant to the terms of a 
Partnership Agreement, dated as of the date hereof, by and among FMC, 
Harsco L.P. and UD (the "Partnership Agreement").  The execution and 
delivery of this Agreement is a condition to the obligations of FMC, 
Harsco Corporation, a Delaware corporation ("Harsco") and Harsco L.P. 
under the Participation Agreement dated as of the date hereof (the 
"Participation Agreement"), to which this Agreement is attached as 
Exhibit J.

NOW, THEREFORE, in consideration of the mutual covenants contained 
herein and other good and valuable consideration, the receipt and 
sufficiency of which are hereby acknowledged, the parties to this 
Agreement hereby agree as follows:  

1.  Certain Definitions.

Unless otherwise defined below, capitalized terms used herein will have 
the meanings set forth in Annex A to the Participation Agreement.

"Demand Registration" has the meaning set forth in Section 3(a).

"Included Securities" has the meaning set forth in Section 3(a).

"IPO" has the meaning set forth in Section 4(e).

"Net Public Price" has the meaning set forth in Section 3(c).

"Piggyback Registration" has the meaning set forth in Section 4(a).

"Public Price" has the meaning set forth in Section 3(c).

"Registrable Securities" means all shares of UD's common stock, issued 
to FMC or Harsco L.P. (i) upon the incorporation of UD pursuant to 
Section 2 hereof and (ii) as a dividend or other distribution with 
respect to or in exchange for or in replacement of the shares referenced 
in (i) above.  As to any particular Registrable Securities, such 
securities will cease to be Registrable Securities when they have been 
distributed to the public pursuant to an offering registered under the 
Securities Act or sold to the public through a broker, dealer or market 
maker in compliance with Rule 144 or Rule 144A under the Securities Act 
(or any similar rule then in force).  For purposes of this Agreement, a 
Person will be deemed to be a holder of Registrable Securities on any 
given date whenever such Person has the right to acquire directly or 
indirectly such Registrable Securities (upon conversion or exercise in 
connection with a transfer of securities or otherwise within six months 
of such date, but disregarding any restrictions or limitations upon the 
exercise of such right), whether or not such acquisition has actually 
been effected.  

"Registration Expenses" has the meaning set forth in Section 7(a).

"Requesting Party" has the meaning set forth in Section 2(a).

"Securities Act" means the Securities Act of 1933, as amended.

"Total Common Equity Value" has the meaning set forth in Section 2(b).

2.Incorporation of UD.

(a)  At any time after the eighteen-month anniversary of the Closing 
Date, either FMC or Harsco L.P. (the "Requesting Partner") may request 
in a written notice to the non-requesting Partner and UD that UD be 
incorporated or organized as a corporation in the State of Delaware.  UD 
will thereafter make all filings required and take all other reasonable 
steps to effect such incorporation under the Delaware General 
Corporation Law; provided that (i) such incorporation is subject to UD's 
receipt of all required government approvals (including any approval 
required by the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as 
amended, but excluding any novation agreement that is required between 
UD and the U.S. Government) and any third-party consent which if not 
received would have a Material Adverse Effect on UD, which the parties 
hereto agree to use their reasonable best efforts to obtain and (ii) the 
effectiveness of such incorporation need not take place until 
immediately prior to the effectiveness of a registration statement (or, 
if required by the SEC as a condition to such effectiveness, the day 
prior to the anticipated effectiveness of such registration statement) 
pursuant to a request for registration under Section 3(a) below by a 
Requesting Partner.  Effective as of the date of such incorporation, 
shares of common stock in the new corporation will be issued to each of 
FMC and Harsco L.P. in proportion to their respective Share Percentages 
immediately prior to incorporation.

(b)  Upon the effectiveness of the incorporation of UD, the parties will 
continue to be governed, to the fullest extent possible (but subject to 
the stockholders' agreement referred to below), by the terms of the 
Participation Agreement and all rights and obligations thereunder 
(including those relating to indemnification) will remain in full force 
and effect.  Effective as of the date of such incorporation, (i) the 
Limited Partner Allocation to be distributed by UD in accordance with 
Section 6.1 of the Partnership Agreement shall be terminated and (ii) 
the incorporated UD shall authorize and issue to Harsco L.P. all of the 
shares of a series of preferred stock having the terms outlined on Annex 
A hereto and having an aggregate par value determined by calculating the 
Capitalized Limited Partner Allocation as of the date of issuance of the 
preferred stock; provided that, for purposes of determining the Earnings 
Multiple in connection therewith, the "Total Common Equity Value" shall 
be used in lieu of the Appraised Value, where Total Common Equity Value 
equals the product of (i) the gross public offering price per share of 
the UD common stock being sold in the offering and (ii) the number of 
shares of UD common stock issued to the partners of UD upon its 
incorporation pursuant to this Agreement.  In connection with the 
incorporation of UD, the parties hereto will, pursuant to Section 3.1(a) 
of the Partnership Agreement, negotiate in good faith to adopt an 
appropriate certificate of incorporation and by-laws and to enter into 
(i) all amendments to the Operative Documents necessary to effect the 
conversion of UD from a partnership to a corporation and otherwise to 
give effect to the provisions contemplated by the Operative Documents 
after such incorporation and (ii) a stockholders' agreement having the 
terms outlined on Annex B hereto.  In addition, the actions contemplated 
by Section 7.3 of the Partnership Agreement will be taken upon 
incorporation of UD.

3.  Demand Registrations.

(a)  Requests for Registration.  Each Partner may request a total of two 
registrations under the Securities Act, in which UD will pay all 
Registration Expenses, of all or a part of its Registrable Securities on 
Form S-1 or other form permitted by the rules of the SEC, to be 
effective at any time after the twenty-five month anniversary of the 
Closing Date, upon at least 90 days' (180 days' in the case of an 
initial public offering) prior notice; provided, that any such request 
must be in writing and delivered to UD and must specify such number of 
Registrable Securities as is reasonably anticipated by the Requesting 
Partner to yield a minimum aggregate price to public of $50,000,000, 
unless such request relates to all of the Registrable Securities then 
held by the Requesting Partner.  Within five (5) Business Days after 
receipt of such request, UD will give written notice of such requested 
registration to all other holders of Registrable Securities.  UD will 
include in such registration (i) the number of Registrable Securities 
requested to be included by the Requesting Partner (the "Included 
Securities") and (ii) that number of Registrable Securities, held by 
other holders who have delivered to UD (within ten (10) Business Days 
after receipt of UD's notice) a written request for inclusion, which the 
lead managing underwriter advises UD in writing does not exceed the 
number that can be sold in an orderly manner in such offering within a 
price range acceptable to the Requesting Partner.  A registration 
requested pursuant to this Section 3(a) is referred to herein as a 
"Demand Registration," and the Registrable Securities registered thereby 
will be offered and sold to the public in an underwritten offering.

(b)  Selection of Underwriters.  At the time of requesting a Demand 
Registration, the Requesting Partner will select the lead managing 
underwriter of such Demand Registration from among the following three 
investment banking firms:  (1) Morgan Stanley & Co. Incorporated, (2) 
Salomon Brothers Inc and (3) Goldman, Sachs & Co.  UD may then select 
one or two nationally recognized investment banking firms to act as 
co-manager of such Demand Registration.

(c)  Determination of Public Price.  In connection with any Demand 
Registration by Harsco L.P., and prior to the filing of any registration 
statement, UD will select a nationally recognized investment banking 
firm from among the co-managers selected by UD which, together with the 
lead managing underwriter, will promptly select a third nationally 
recognized investment banking firm.  Each of the three firms will 
provide to UD, within thirty (30) days of its engagement, a good faith 
estimate of the initial public market voting listed common equity 
offering value of the Included Securities (or, if applicable, the 
partnership interests that are intended to be Included Securities).  The 
three estimates will be averaged, and the estimate that deviates from 
the average by the greatest amount will be ignored, and the average of 
the two remaining values will be the "Public Price."  The Public Price 
less the actual proposed underwriting discount (which shall be 
comparable to that charged by the proposed managing underwriter in 
similar offerings) will be the "Net Public Price."

(d)  Right of First Refusal.  Notwithstanding the foregoing, FMC (or any 
of its Affiliates) may, in its discretion at any time after Harsco L.P. 
has given notice of any of its Demand Registrations but before the 
filing of the registration statement relating to such Demand 
Registration with the SEC, purchase all of the Included Securities (or, 
in the event that UD is not yet a corporation, then all of the 
partnership interests to be included in the public offering to which 
such Demand Registration applies) pursuant to such Demand Registration 
at a purchase price in cash equal to the Net Public Price; provided, 
however, that FMC (or any of its Affiliates) shall not be entitled to 
purchase any such Included Securities (or corresponding partnership 
interests) if, within three (3) Business Days after receipt of notice 
from FMC (or one of its Affiliates) of its intent to exercise its right 
of first refusal pursuant to this sentence, Harsco L.P. withdraws its 
request for Demand Registration.  In addition, if a registration 
statement is filed pursuant to a Demand Registration initiated by Harsco 
L.P. and Harsco L.P. intends to sell the Included Securities for an 
aggregate price (net of underwriting commissions) equal to less than 90% 
of the Net Public Price, Harsco L.P. will so promptly notify FMC and FMC 
will have the right to purchase, within two (2) Business Days after 
receiving such notice, all of the Included Securities for an aggregate 
price in cash equal to that set forth in such notice.  In the event that 
FMC (or any of its Affiliates) exercises its right of first refusal to 
purchase, and does so purchase, Included Securities of Harsco L.P. 
pursuant to this Section 3(d), UD will pay all Registration Expenses 
applicable to the Included Securities, all reasonable expenses 
customarily paid out of the underwriter's discount, with such reasonable 
expenses not to exceed $100,000 and any fees of underwriters which 
Harsco L.P. is obligated to pay, not to exceed $250,000.

(e)  Restrictions on Demand Registrations.  UD may postpone for up to 
three months the filing or the effectiveness of a registration statement 
for the Demand Registration if UD determines in good faith that such 
filing or effectiveness of a registration statement (i) would have a 
material adverse effect on any current proposal or plan by UD or any of 
its Subsidiaries to engage in any acquisition of assets (other than in 
the ordinary course of business), any merger, consolidation, tender 
offer or similar material transaction, any financing or any other 
material transaction or (ii) would require public disclosure of 
information, the public disclosure of which would materially and 
adversely affect UD's business or financial position; provided that in 
such event, the Requesting Partner will be entitled to withdraw its 
request for such Demand Registration and, if such request is withdrawn, 
such Demand Registration will not count as a permitted Demand 
Registration hereunder and UD will pay all Registration Expenses in 
connection with such withdrawn registration.  In the event that the 
Requesting Partner withdraws its request for a Demand Registration other 
than as provided in the foregoing sentence, such Requesting Partner may 
elect either to treat such withdrawn registration as a permitted Demand 
Registration or to pay all Registration Expenses and other expenses 
(including any fees and expenses of underwriters) in connection with 
such withdrawn registration.

(f)  Other Registration Rights.  Except as provided in this Agreement, 
UD will not grant to any Person the right to request UD to register any 
equity securities of UD, or any securities convertible or exchangeable 
into or exercisable for such securities, without the prior written 
consent of the holders of at least eighty percent (80%) of the 
Registrable Securities; provided that UD may grant rights to other 
Persons to request UD to register any equity securities of UD, or any 
securities convertible or exchangeable into or exercisable for such 
securities, on a basis which is pari passu with (or less favorable than) 
rights given to holders of Registrable Securities hereunder, including 
with respect to priorities under Sections 3(a), 4(c) and 4(d), so long 
as it complies with the provisions of the Shareholder Agreement 
described in Section 4 of Annex A to this Agreement and Section 3.1(g) 
of the Partnership Agreement, whichever is applicable, or in the event 
that UD issues such securities in a transaction that does not require 
compliance with any of such Sections.

4.  Piggyback Registrations.

(a)  Right to Piggyback.  Whenever UD proposes to register any of its 
equity securities under the Securities Act (otherwise than on Form S-4, 
Form S-8 or any successor form), including pursuant to a Demand 
Registration by FMC or Harsco L.P., UD will give prompt written notice 
(in any event within three (3) Business Days after its receipt of notice 
of any exercise of demand registration rights other than under this 
Agreement) to all holders of Registrable Securities of its intention to 
effect such a registration (a "Piggyback Registration") and, subject to 
the provisions of Sections 4(c), 4(d) and 4(e) below, will include in 
such registration all Registrable Securities with respect to which UD 
has received written requests for inclusion therein within ten (10) 
Business Days after the receipt of UD's notice.

(b)  Piggyback Expenses.  The Registration Expenses of the holders of 
Registrable Securities will be paid by UD in all Piggyback 
Registrations.  

(c)  Priority on Primary Registrations.  If a Piggyback Registration is 
an underwritten primary registration on behalf of UD, and the lead 
managing underwriter advises UD in writing that the number of securities 
requested to be included in such registration exceeds the number which 
can be sold in an orderly manner in such offering within a price range 
acceptable to UD, then UD will include in such registration (i) first, 
the securities UD proposes to sell, (ii) second (but subject to Section 
3(f)), the Registrable Securities requested to be included in such 
registration by FMC and Harsco L.P., pro rata on the basis of the number 
of shares owned by each and (iii) third, other securities requested to 
be included in such registration, pro rata on the basis of the number of 
shares owned by the holders thereof.

(d)  Priority on Secondary Registrations.  If a Piggyback Registration 
is an underwritten secondary registration on behalf of holders of UD's 
securities (including a holder of Registrable Securities), and the 
managing underwriter advises UD in writing that the number of securities 
requested to be included in such registration exceeds the number which 
can be sold in an orderly manner in such offering within a price range 
acceptable to the holders initially requesting such registration, then 
UD will include in such registration (i) first (but subject to Section 
3(f)), the Registrable Securities requested to be included in such 
registration by FMC and Harsco L.P., pro rata on the basis of the number 
of shares owned by each and (ii) second, other securities requested to 
be included in such registration, pro rata on the basis of the number of 
shares owned by the holders thereof.

(e)  Other Registrations.  If UD has previously received a request for a 
Demand Registration pursuant to Section 3 to file a registration 
statement or has filed a registration statement with respect to 
Registrable Securities pursuant to Section 3, and if such request for 
Demand Registration or previous registration has not been withdrawn or 
abandoned, UD will not file or cause to be effected any other 
registration of any of its equity securities or securities convertible 
or exchangeable into or exercisable for its equity securities under the 
Securities Act (except on Form S-4, Form S-8 or any successor form), 
whether on its own behalf or at the request of any holder or holders of 
such securities, until a period of at least ninety (90) days (or, in the 
case of the initial public offering by UD (the "IPO"), one hundred 
eighty (180) days) has elapsed from the effective date of such previous 
registration unless the managing underwriters of the previous registered 
public offering otherwise agree in writing.  

5.  Holdback Agreements.

(a)  Each holder of Registrable Securities agrees not to effect any 
public sale or distribution (including sales pursuant to Rule 144 or 
Rule 144A under the Securities Act) of equity securities of UD, or any 
securities convertible into or exchangeable or exercisable for such 
securities, during the thirty (30) days prior to and the 90-day period 
(or, in the case of the IPO, 180-day period) beginning on the effective 
date of any underwritten Demand Registration or any underwritten 
Piggyback Registration in which Registrable Securities are (or could 
have been) included (except as part of such underwritten registration), 
unless the underwriters managing the registered public offering 
otherwise agree.

(b)  UD agrees not to effect any public sale or distribution of its 
equity securities, or any securities convertible into or exchangeable or 
exercisable for such securities, during the thirty (30) days prior to 
and during the 90-day period (or, in the case of the IPO, 180-day 
period) beginning on the effective date of any underwritten Demand 
Registration or any underwritten Piggyback Registration (except as part 
of such underwritten registration or pursuant to registrations on Form 
S-4, Form S-8 or any successor form), unless the underwriters managing 
the registered public offering otherwise agree.

6.  Registration Procedures.  Whenever any Requesting Partner has 
requested that any Registrable Securities be registered pursuant to this 
Agreement, UD will, subject to the provisions of this Agreement, use its 
reasonable best efforts to effect the registration and the sale of such 
Registrable Securities in accordance with the intended method of 
disposition thereof, and pursuant thereto UD will as expeditiously as 
reasonably possible:  

(a)  prepare and file with the SEC a registration statement with respect 
to such  Registrable Securities and use its reasonable best efforts to 
cause such registration statement to become effective (provided that 
before filing a registration statement or prospectus or any amendments 
or supplements thereto, UD will furnish to the counsel selected by the 
Requesting Partner and the counsel selected by the lead managing 
underwriter copies of all such documents proposed to be filed, which 
documents will be subject to the review of such counsel); 

(b)  (1)  prepare and file with the SEC such amendments and supplements 
to such registration statement and the prospectus used in connection 
therewith as may be necessary to keep such registration statement 
effective for a period of not more than nine months and (2) comply with 
the provisions of the Securities Act with respect to the disposition of 
all securities covered by such registration statement during such period 
in accordance with the intended methods of disposition by the sellers 
thereof set forth in such registration statement; 

(c)  furnish to each seller of Registrable Securities such number of 
copies of such registration statement, each amendment and supplement 
thereto, the prospectus included in such registration statement 
(including each preliminary prospectus) and such other documents as such 
seller may reasonably request in order to facilitate the disposition of 
the Registrable Securities owned by such seller; 

(d)  use its reasonable best efforts to register or qualify such 
Registrable Securities under such other securities or blue sky laws of 
such jurisdictions as any seller reasonably requests and do any and all 
other acts and things which may be reasonably necessary or advisable to 
enable such seller to consummate the disposition in such jurisdictions 
of the Registrable Securities owned by such seller (provided that UD 
will not be required to (i) qualify generally to do business in any 
jurisdiction where it would not otherwise be required to qualify but for 
this Section, (ii) subject itself to taxation in any such jurisdiction 
or (iii) consent to general service of process in any such 
jurisdiction); 

(e)  notify each seller of such Registrable Securities, at any time when 
a prospectus relating thereto is required to be delivered under the 
Securities Act, of the happening of any event as a result of which the 
prospectus included in such registration statement contains an untrue 
statement of a material fact or omits any material fact necessary to 
make the statements therein not misleading in light of the circumstances 
then existing, and, at the request of any such seller, UD will prepare 
and furnish to such seller a reasonable number of copies of a supplement 
or amendment to such prospectus so that, as thereafter delivered to the 
purchasers of such Registrable Securities, such prospectus will not 
contain an untrue statement of a material fact or omit to state any 
material fact necessary to make the statements therein not misleading in 
light of the circumstances then existing; 

(f)  use its reasonable best efforts to cause all such Registrable 
Securities to be listed on each securities exchange on which similar 
securities issued by UD are then listed and, if not so listed, to become 
listed on either (as UD determines) a national securities exchange or 
the NASD automated quotation system and, if listed on the NASD automated 
quotation system, use its reasonable best efforts to secure designation 
of all such Registrable Securities covered by such registration 
statement as a NASDAQ "national market system security" or, failing 
that, to secure NASDAQ authorization for such Registrable Securities 
and, without limiting the generality of the foregoing, to arrange for at 
least two market makers to register as such with respect to such 
Registrable Securities with the NASD; 

(g)  provide a transfer agent and registrar for all such Registrable 
Securities not later than the effective date of such registration 
statement; 

(h)  enter into such customary agreements (including underwriting 
agreements in customary form consistent with this Agreement) and take 
all such other actions customary for such offerings as the Requesting 
Partner or the underwriters reasonably request in order to expedite or 
facilitate the disposition of the UD securities being sold (including, 
without limitation, effecting a stock split or a combination of shares); 

(i)  use its reasonable best efforts to make available for inspection by 
any seller of Registrable Securities, any underwriter participating in 
any disposition pursuant to such registration statement and any attorney 
retained by any such seller or underwriter, an executed copy of (i) an 
opinion of counsel for UD addressed to such seller and such underwriter 
and (ii) a "comfort" letter from the independent public accountants who 
have reported on UD's financial statements included or incorporated by 
reference in such registration statement addressed to such seller and 
such underwriter, covering substantially the same matters with respect 
to such registration statement, and the prospectus included therein 
(including, in the case of the accountants' comfort letter, with respect 
to events subsequent to the date of such financial statements), as are 
customarily covered in opinions of issuer's counsel and in accountants' 
comfort letters delivered to the underwriters in underwritten public 
offerings of securities (and dated the dates such opinions and comfort 
letters are customarily dated) and, in the case of the accountants' 
comfort letter, such other financial matters, and in the case of the 
legal opinion, such other legal matters, as such seller or such 
underwriter may reasonably request; 

(j)  otherwise use its reasonable best efforts to comply with all 
applicable rules and regulations of the SEC, and make available to its 
security holders, as soon as reasonably practicable, an earnings 
statement covering the period of at least twelve months beginning with 
the first day of UD's first full calendar quarter after the effective 
date of the registration statement, which earnings statement will 
satisfy the provisions of Section 11(a) of the Securities Act and 
Rule 158 thereunder; 

(k)  permit any holder of Registrable Securities which holder is or 
might be deemed to be an underwriter or a controlling person of UD, to 
participate in the preparation of such registration or comparable 
statement; 

(l)  in the event of the issuance of any stop order suspending the 
effectiveness of a registration statement, or of any order suspending or 
preventing the use of any related prospectus or suspending the 
qualification of any common stock included in such registration 
statement for sale in any jurisdiction, use its reasonable best efforts 
promptly to obtain the withdrawal of such order; and

(m)  use its reasonable best efforts to cause such Registrable 
Securities covered by such registration statement to be registered with 
or approved by such other governmental agencies or authorities as may be 
necessary to enable the sellers thereof to consummate  the disposition 
of such Registrable Securities.

If any such registration or comparable statement refers to any holder by 
name or otherwise as the holder of any securities of UD and if such 
holder is or might be deemed to be a controlling person of UD, such 
holder will have the right to require (i) the insertion therein of 
language, in form and substance satisfactory to such holder and 
presented to UD in writing, to the effect that the holding by such 
holder of such securities is not to be construed as a recommendation by 
such holder of the investment quality of UD's securities covered thereby 
and that such holding does not imply that such holder will assist in 
meeting any future financial requirements of UD, or (ii) in the event 
that such reference to such holder by name or otherwise is not required 
by the Securities Act or any similar Federal statute then in force, the 
deletion of the reference to such holder; provided that with respect to 
this clause (ii) such holder will furnish to UD an opinion of counsel to 
such effect, which opinion of counsel will be reasonably satisfactory to 
UD.  In the event of a Demand Registration under this Agreement, the 
Requesting Party will furnish any information, execute any customary 
agreements (including a customary underwriting agreement) and take any 
other action in connection with such Demand Registration that is 
reasonably requested by UD or the managing underwriter of such Demand 
Registration.

7.  Registration Expenses.

(a)  All expenses incident to UD's performance of or compliance with 
this Agreement, including without limitation all registration, 
qualification and filing fees, fees and expenses of compliance with 
securities or blue sky laws, printing expenses, messenger and delivery 
expenses, fees and disbursements of counsel for UD and of all 
independent certified public accountants and of other Persons retained 
by UD (all such expenses being herein called "Registration Expenses"), 
will be borne by UD, except as provided in this Agreement.  In addition, 
UD will pay its internal expenses (including, without limitation, all 
salaries and expenses of its officers and employees performing legal or 
accounting duties), the expense of any annual audit or quarterly review 
and the expenses and fees for listing the securities to be registered on 
each securities exchange on which similar securities issued by UD are 
then listed or on the NASD automated quotation system.  Holders of 
Registrable Securities included in any proposed public offering will in 
any event pay all fees and expenses of counsel and underwriters retained 
by them, except as otherwise provided in Section 3(d) above.

(b)  Except as provided in Sections 3(a), 3(d), 3(e), 4(b) or 7(a) 
above, each holder of securities included in any registration hereunder 
will pay those Registration Expenses allocable to the registration of 
such holder's securities so included, and any Registration Expenses not 
so allocable will be borne by all sellers of securities included in such 
registration in proportion to the aggregate selling price of the 
securities to be so registered.  

8.  Indemnification.

(a)  UD agrees to indemnify, to the extent permitted by law, each holder 
of Registrable Securities included in a registration under the terms of 
this Agreement, its officers and directors and each Person who controls 
such holder (within the meaning of Section 15 of the Securities Act) and 
its officers and directors against all losses, claims, damages, 
liabilities and expenses arising out of or based on any untrue or 
alleged untrue statement of a material fact contained in any 
registration statement, prospectus or preliminary prospectus or any 
amendment thereof or supplement thereto or any omission or alleged 
omission of a material fact required to be stated therein or necessary 
to make the statements therein not misleading in light of the 
circumstances then existing, and will reimburse each such holder, its 
officers and directors and each Person who controls such holder (within 
the meaning of Section 15 of the Securities Act) and its officers and 
directors for any legal and other expenses reasonably incurred by them 
in connection with investigating, defending or settling any such losses, 
claims, damages, liabilities and expenses, except insofar as the same 
arise out of or are based on any untrue statement or omission contained 
in any information furnished in writing to UD by such holder expressly 
for use therein or by such holder's failure to deliver a copy of the 
registration statement or prospectus or any amendments or supplements 
thereto after UD has furnished such holder with a sufficient number of 
copies of the same.  In connection with an underwritten offering, UD 
will indemnify such underwriters, their officers and directors and each 
Person who controls such underwriters (within the meaning of Section 15 
of the Securities Act) and its officers and directors to the same extent 
as provided above with respect to the indemnification of the holders of 
Registrable Securities.

(b)  In connection with any registration statement in which a holder of 
Registrable Securities is participating, each such holder will furnish 
to UD in writing such information and affidavits as UD reasonably 
requests for use in connection with any such registration statement or 
prospectus and, to the extent permitted by law, agrees to indemnify UD, 
its directors and officers and each Person who controls UD (within the 
meaning of Section 15 of the Securities Act) and its officers and 
directors against any losses, claims, damages, liabilities and expenses 
resulting from any untrue or alleged untrue statement of a material fact 
contained in the registration statement, prospectus or preliminary 
prospectus or any amendment thereof or supplement thereto or any 
omission or alleged omission of a material fact required to be stated 
therein or necessary to make the statements therein not misleading in 
light of the circumstances then existing, but only to the extent that 
such untrue or alleged untrue statement or omission or alleged omission 
is contained in any information or affidavit so furnished in writing by 
such holder expressly for use therein; provided that the obligation to 
indemnify pursuant to this Section 8(b) will be individual to each 
holder and will be limited to the net amount of proceeds received by 
such holder from the sale of Registrable Securities pursuant to such 
registration statement.  

(c)  Any Person entitled to indemnification hereunder will (i) give 
prompt written notice to the indemnifying party of any claim with 
respect to which it seeks indemnification and (ii) permit such 
indemnifying party to assume the defense of such claim with counsel 
reasonably satisfactory to the indemnified party unless in such 
indemnified party's reasonable judgment representation of both parties 
by the same counsel would be inappropriate due to actual or potential 
differing interests between them.  In any event, the indemnifying party 
will not be subject to any liability for any settlement made by the 
indemnified party without its consent (which consent will not be 
unreasonably withheld).  An indemnifying party who is not entitled to, 
or elects not to, assume the defense of a claim will not be obligated to 
pay the fees and expenses of more than one counsel for all parties 
indemnified by such indemnifying party with respect to such claim, 
unless in the reasonable judgment of any indemnified party a conflict of 
interest may exist between such indemnified party and any other of such 
indemnified parties with respect to such claim.

(d)  The indemnification provided for under this Agreement will remain 
in full force and effect regardless of any investigation made by or on 
behalf of the indemnified party or any officer, director or controlling 
Person of such indemnified party and will survive the transfer of 
securities.  UD also agrees to make such provisions, as are reasonably 
requested by any indemnified party, for contribution to such party in 
the event UD's indemnification is unavailable for any reason.

9.  Participation in Underwritten Registrations.  No Person may 
participate in any registration hereunder which is underwritten unless 
such Person (a) agrees to sell such Person's securities on the basis 
provided in any underwriting arrangements approved by the Person or 
Persons initiating such registration and (b) completes and executes all 
questionnaires, powers of attorney, indemnities, customary underwriting 
agreements and other documents required under the terms of such 
underwriting arrangements for persons in comparable positions.

10.  Rule 144.  For so long as either Partner holds any Registrable 
Securities, UD will use its reasonable best efforts to (i) make and keep 
adequate current public information (within the meaning of Rule 144(c) 
under the Securities Act) with respect to UD available at all times from 
and after ninety (90) days following the effective date of the first 
registration under the Securities Act filed by UD for an offering of 
securities to the general public; (ii) file with the SEC in a timely 
manner all reports and other documents required of UD under the 
Securities Act and the Securities Exchange Act of 1934 at any time after 
it has become subject to such reporting requirements; and (iii) upon 
request by either Partner, deliver to such Partner a written statement 
as to whether it has complied with the requirements referred to in (i) 
and (ii) above.

11.  Miscellaneous.

(a)  No Inconsistent Agreements.  UD will not hereafter enter into any 
agreement with respect to its securities which is inconsistent with or 
violates the rights granted to the holders of Registrable Securities in 
this Agreement.  

(b)  Remedies.  Any Person having rights under any provision of this 
Agreement will be entitled to enforce such rights specifically to 
recover damages caused by reason of any breach of any provision of this 
Agreement and to exercise all other rights granted by law.  The parties 
hereto agree and acknowledge that money damages may not be an adequate 
remedy for any breach of the provisions of this Agreement and that any 
party may apply to any court of law or equity of competent jurisdiction 
for specific performance and for other injunctive relief in order to 
enforce or prevent violation of the provisions of this Agreement. 

(c)  Amendments and Waivers.  No term or provision of this Agreement may 
be amended or waived unless in writing signed by the party against which 
such amendment or waiver is sought to be enforced, provided that Harsco 
L.P. will not unreasonably withhold or delay its consent to any such 
amendment or waiver proposed by FMC in order to effect the granting of 
registration rights to a third party in a transaction which complies 
with Section 3(f) hereof.  

(d)  Successors and Assigns.  All covenants and agreements in this 
Agreement by or on behalf of any of the parties hereto will bind and 
inure to the benefit of the respective successors and permitted assigns 
of the parties hereto whether so expressed or not.  In addition, whether 
or not any express assignment has been made, the provisions of this 
Agreement which are for the benefit of purchasers or holders of 
Registrable Securities are also for the benefit of, and enforceable by, 
any permitted subsequent holder of Registrable Securities.  No sale of 
Registrable Securities hereunder will relieve the holder of its 
obligations under this Agreement or under any other Operative Document.  
The right of Harsco L.P. to request incorporation of UD pursuant to 
Section 2(a) may not be assigned, directly or indirectly, unless in 
connection with the assignment of a Share Percentage in excess of 20%.

(e)  Severability.  Whenever possible, each provision of this Agreement 
will be interpreted in such manner as to be effective and valid under 
applicable law, but if any provision of this Agreement is held to be 
prohibited by or invalid under applicable law, such provision will be 
ineffective only to the extent of such prohibition or invalidity, 
without invalidating the remainder of this Agreement.  

(f)  Counterparts.  This Agreement may be executed simultaneously in two 
or more counterparts, any one of which need not contain the signatures 
of more than one party, but all such counterparts taken together will 
constitute one and the same Agreement.  

(g)  Descriptive Headings.  The descriptive headings of this Agreement 
are inserted for convenience only and do not constitute a part of this 
Agreement.  

(h)  Governing Law.  This Agreement will be governed by and construed in 
accordance with the domestic laws of the State of Delaware, without 
giving effect to any choice of law or conflict of law provision or rule 
(whether of the State of Delaware or any other jurisdiction) that would 
cause the application of the laws of any jurisdiction other than the 
State of Delaware.  In furtherance of the foregoing, the internal law of 
the State of Delaware will  control the interpretation and construction 
of this Agreement, even though under that jurisdiction's choice of law 
or conflict of law analysis, the substantive law of some other 
jurisdiction would ordinarily apply.

(i)  Liability of UD.  Any liability under this Agreement of UD to 
Harsco L.P. or to any underwriter or other Person retained by Harsco 
L.P. or to any Person who controls any of the foregoing (within the 
meaning of Section 15 of the Securities Act) arising out of the 
transactions contemplated hereby shall be the sole obligation of UD and 
shall be explicitly nonrecourse to FMC, Harsco, Harsco L.P. and the 
Affiliates (other than UD) of each of them.

(j)  Notices.  Any notice provided for in this Agreement will be in 
writing and will be either personally delivered, or mailed first class 
mail (postage prepaid) or sent by reputable overnight courier service 
(charges prepaid) to UD, FMC and Harsco L.P. at the addresses set forth 
below and to any subsequent holder of UD securities subject to this 
Agreement at such address as indicated by UD's records, or at such 
address or to the attention of such other person as the recipient party 
has specified by prior written notice to the sending party.  Notices 
will be deemed to have been given hereunder when delivered personally, 
three (3) days after deposit in the U.S. mail and one day after deposit 
with a reputable overnight courier service.

To UD:

     United Defense, L.P.
     1525 Wilson Boulevard
     Suite 700
     Arlington, VA  22209
     Attn:  Chief Executive Officer
     Telephone:(703) 312-6100
     Telecopy:(703) 312-6111

To FMC:

     FMC Corporation
     200 East Randolph Drive
     Chicago, IL  60601
     Attn:  Corporate Secretary
     Telephone:  (312) 861-5923
     Telecopy:   (312) 861-7127

with a copy to:

     Kirkland & Ellis
     200 East Randolph Drive
     Chicago, IL  60601
     Attn:  Michael G. Timmers
     Telephone:  (312) 861-2224
     Telecopy:   (312) 861-2200

To Harsco L.P.:

     Harsco Defense Holding, Inc.
     P.O. Box 8888
     Camp Hill, PA  17011
     Attn:  President (with a copy to the General Counsel)
     Telephone:  (717) 763-6406
     Telecopy:   (717) 763-6402

IN WITNESS WHEREOF, the parties have executed this Agreement as of the 
date first written above.

UNITED DEFENSE, L.P.

By:     FMC CORPORATION,
        a Delaware corporation,
        Its Managing General Partner

        By /S/ Robert L. Day
        Its Secretary

FMC CORPORATION

        By /S/ Robert L. Day
        Its Secretary

HARSCO DEFENSE HOLDING, INC.

        By /S/ Paul C. Coppock
        Its Secretary

ANNEX A
Terms of Senior Preferred Stock

Designation                               Senior Preferred Stock, par 
value
                                          $100 per share

Dividend Rights                           Equal to Limited Partner 
Allocation,
                                          subject to annual adjustment

                                          Payable quarterly

                                          Cumulative, whether or not 
earned
                                          Preferential:  no dividends 
may be paid
                                          on any other capital stock and 
no other
                                          distribution may be made while 
any
                                          accumulated dividend is unpaid

                                          No stock may be acquired for 
value while
                                          any accumulated dividend is 
unpaid and
                                          no capital stock pari passu 
with or
                                          junior to the Senior Preferred 
may be
                                          acquired for value while any 
Senior
                                          Preferred is outstanding

Redemption                                Redeemable at par plus 
accumulated
                                          dividends

                                          Must be redeemed before any 
other
                                          capital stock is redeemed or 
acquired
                                          for value by issuer

                                          At any time while shares of 
Senior
                                          Preferred are outstanding, UD 
has the
                                          right, at its option, to call 
for
                                          redemption any or all shares 
of the
                                          Senior Preferred for an amount 
equal to
                                          their par value plus accrued 
but unpaid
                                          dividends.  Upon any sale of 
shares of
                                          UD common stock by Harsco L.P. 
to an
                                          unrelated third party 
(including the
                                          initial public offering), UD 
shall be
                                          required to call for 
redemption (for the
                                          amount set forth in the 
preceding
                                          sentence) that number of 
shares of
                                          Senior Preferred held by 
Harsco L.P.
                                          which bears the same 
proportion to the
                                          total number of shares of 
Senior
                                          Preferred issued to Harsco 
L.P. upon
                                          incorporation of UD pursuant 
to the
                                          Registration Rights Agreement 
as the
                                          number of shares of common 
stock sold by
                                          Harsco L.P. bears to the total 
number of
                                          shares of common stock issued 
to Harsco
                                          L.P. upon such incorporation

Voting Rights                             If UD defaults in the timely 
and full
                                          payment of any quarterly 
dividend on the
                                          Senior Preferred Stock, then 
the amount
                                          of each of the next three 
monthly
                                          payments of Annual Fees to be 
paid to
                                          FMC under the Management 
Services
                                          Agreement shall be reduced by 
an amount
                                          equal to one twelfth of the 
difference
                                          between the Annual Fee in 
effect and
                                          $5,000,000, multiplied by the 
fraction,
                                          the numerator of which is the 
amount of
                                          the quarterly dividend paid 
and the
                                          denominator of which is the 
amount of
                                          the dividend payable

                                          If UD (i) defaults in the 
timely and
                                          full payment of a total of 
four
                                          quarterly dividends on the 
Senior
                                          Preferred Stock and (ii) has 
failed to
                                          reduce the monthly payments of 
Annual
                                          Fees to FMC (as provided for 
above) for
                                          each such default in the 
timely and full
                                          payment of quarterly 
dividends, then
                                          until all arrearages of all 
accumulated
                                          dividends have been paid,  the 
Senior
                                          Preferred voting separately, 
as a single
                                          class, shall have the sole 
right to
                                          elect a majority of the full 
board of
                                          directors of UD

                                          When all arrearages are paid, 
the Senior
                                          Preferred right to vote, if 
any, shall
                                          terminate and the terms of 
directors
                                          elected by the Senior 
Preferred shall
                                          expire

                                          Any vacancy in the office of 
any
                                          director elected by the Senior 
Preferred
                                          shall be filled by the Senior 
Preferred

Consents Required from Senior Preferred   Creation of any class of 
capital stock
                                          ranking pari passu with or 
senior to the
                                          Senior Preferred with respect 
to either
                                          payment of dividends or 
distributions or
                                          in the event of voluntary or 
involuntary
                                          liquidation, dissolution or 
winding up

                                          Amendment or alteration of or 
change in
                                          the powers, preferences or 
special
                                          rights of the Senior Preferred

                                          Merger into or consolidation 
with any
                                          other entity or disposition of 
all or
                                          substantially all of UD's 
assets

Liquidation                               Senior Preferred entitled to 
receive out
                                          of assets of UD cash in an 
amount equal
                                          to par value plus all 
accumulated
                                          dividends before any payment 
or
                                          distribution shall be made on 
any other
                                          capital stock

ANNEX B

Terms of Stockholders' Agreement

1.  Parties:  UD, FMC and Harsco L.P.

<F1> 2.  Board representation:  FMC agrees to vote for four Harsco 
L.P.-nominated directors if Harsco L.P. has maintained a Share 
Percentage of 40%.  Upon any adjustment of the Share Percentages, FMC 
agrees to vote for the number of Harsco L.P.-nominated directors closest 
to one-tenth of Harsco L.P.'s Share Percentage, provided that if Harsco 
L.P.'s Share Percentage is a whole number ending in five, then FMC 
agrees to vote for the number of such directors closest to one-tenth of 
such Share Percentage rounded down to the next lowest multiple of ten.  
For purposes of this item 2, in the event that UD has been incorporated, 
"Share Percentage" means Harsco's percentage ownership of UD's 
outstanding common stock.  The provisions of this item 2 shall be 
proportionately adjusted in the event that the Board of UD has a number 
of directors which is more or less than ten.

<F1> 3.  Corporate governance provisions substantially the same as in 
Section 3.1 of the Partnership Agreement (other than Section 3.1(k))

<F1> 4.  Harsco L.P. to have preemptive right with respect to issuances 
of common stock for cash (except employee stock options for up to 5% of 
the total outstanding number of shares of common stock of UD)

5.  Prohibition on transfer of Harsco L.P. stock except pursuant to 
underwritten registered offering (subject to FMC right of first refusal) 
as provided in Registration Rights Agreement or private sale (subject to 
FMC right of first refusal) as provided in Partnership Agreement.

6.  Put/call provisions in Harsco L.P. stock substantially the same as 
in Section 7.2 of the Partnership Agreement.

7.  UD assumes all of Partnership's rights and obligations under the 
Partnership Agreement and Participation Agreement, including 
indemnification provisions.

[FN]
<F1>  These terminate at such time as Harsco L.P.'s ownership of UD 
common stock is less than 20% of total UD outstanding common stock.  
Stock issued or issuable pursuant to employee stock options is ignored 
for purposes of determining Harsco L.P.'s percentage ownership of UD 
stock.