EXHIBIT 21.1 PRIMARY SUBSIDIARIES OF CNAF PLACE OF COMPANY INCORPORATION - ------- ------------- American Casualty Company of Reading, Pennsylvania Pennsylvania Boston Old Colony Insurance Company Massachusetts CNA Casualty of California California CNA Lloyd's of Texas Texas CNA Reinsurance Company, Ltd. United Kingdom CNA Surety Corporation Delaware Columbia Casualty Company Illinois Commercial Insurance Company of Newark, New Jersey New Jersey Continental Assurance Company Illinois Continental Casualty Company Illinois Continental Reinsurance Corporation California Firemen's Insurance Company of Newark, New Jersey New Jersey First Insurance Company of Hawaii, Ltd. Hawaii Kansas City Fire & Marine Insurance Company Missouri National Fire Insurance Company of Hartford Connecticut National-Ben Franklin Insurance Company of Illinois Illinois Niagara Fire Insurance Company Delaware EXHIBIT 21.1 (continued) PLACE OF COMPANY INCORPORATION - ------- ------------- Pacific Insurance Company California RSKCo, Claim Services, Inc. Illinois The Buckeye Union Insurance Company Ohio The Continental Insurance Company New Hampshire The Continental Insurance Company of New Jersey New Jersey The Continental Corporation New York The Fidelity & Casualty Company of New York New Hampshire The Glens Falls Insurance Company Delaware The Mayflower Insurance Company Ltd. Indiana Transcontinental Insurance Company New York Transportation Insurance Company Illinois Valley Forge Insurance Company Pennsylvania Valley Forge Life Insurance Company Pennsylvania All other subsidiaries, when aggregated, are not considered significant.