Anteon Sets Record Date for Special Stockholders' Meeting

About Anteon

Anteon, headquartered in Fairfax, Virginia, is a leadinginformation technology company serving the U.S. Federal government andinternational customers. Anteon designs, integrates, maintains, andupgrades state-of-the-art systems for national defense, intelligence,homeland security, and other high priority government missions. Anteonprovides numerous government clients with the systems integration,strategy and program management, systems engineering, operationsservices, and simulation and training skills necessary to manage thedevelopment and operations of their mission critical systems. TheCompany was founded in 1976 and currently employs over 9,500 employeesin more than 100 offices worldwide. Anteon consistently ranks amongthe top information technology integrators based on independentsurveys, and has been named to the Forbes List of the 400 Best BigCompanies in 2005, earning distinction on the Forbes Platinum List.Anteon is listed on the Standards & Poor's MidCap 400 Index. For moreinformation, visit www.anteon.com.

PARTICIPANTS IN SOLICITATION

Anteon International Corporation and its respective directors andexecutive officers and other members of management and employees maybe deemed to be participants in the solicitation of proxies fromAnteon International Corporation's stockholders in respect of theproposed transaction. Information regarding Anteon InternationalCorporation's participants is available in Anteon InternationalCorporation's proxy statement, dated April 22, 2005, for its 2005annual meeting of stockholders and has been included in thepreliminary Proxy Statement with respect to the special meeting. Theinformation will also be updated by a final Proxy Statement to befiled with the SEC.

CAUTIONARY LANGUAGE CONCERNING FORWARD-LOOKING STATEMENTS

Statements herein regarding the proposed transaction betweenAnteon International Corporation and General Dynamics Corporation, theexpected timetable for completing the transaction, future financialand operating results, benefits and synergies of the transaction,future opportunities for the combined company and any other statementsabout Anteon International Corporation management's futureexpectations constitute forward looking statements within the meaningof the Private Securities Litigation Reform Act of 1995. Suchstatements are based upon the current beliefs and expectations ofAnteon International Corporation's management and are subject tosignificant risks and uncertainties. There are a number of importantfactors that could cause actual results or events to differ materiallyfrom those indicated by such forward looking statements, including:the ability to obtain governmental approvals of the transaction on theproposed terms and schedule and the failure of Anteon InternationalCorporation stockholders to approve the transaction. Additionalfactors that may affect future results are contained in AnteonInternational Corporation's filings with the Securities and ExchangeCommission ("SEC"), including its Annual Report on Form 10-K for theyear ended December 31, 2004, which are available at the SEC's Website (http://www.sec.gov). The information set forth herein speaksonly as of the date hereof, and Anteon International Corporationdisclaims any intention or obligation to update any forward lookingstatements as a result of developments occurring after the datehereof.

IMPORTANT ADDITIONAL INFORMATION WILL BE FILED WITH THE SEC

In connection with the proposed transaction, Anteon InternationalCorporation has filed a preliminary Proxy Statement with the SEC andplans to file a final Proxy Statement with the SEC and mail such finalProxy Statement to its stockholders. INVESTORS AND SECURITY HOLDERS OFANTEON INTERNATIONAL CORPORATION ARE URGED TO READ THE PROXY STATEMENTAND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC WHEN THEY AREAVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT ANTEONINTERNATIONAL CORPORATION, THE PROPOSED TRANSACTION AND RELATEDMATTERS. The final Proxy Statement will be mailed to stockholders ofAnteon International Corporation. Investors and security holders ofAnteon International Corporation will be able to obtain copies of theProxy Statement, when they become available, as well as other filingswith the SEC that will be incorporated by reference into suchdocuments, containing information about Anteon InternationalCorporation, without charge, at the SEC's Internet site(http://www.sec.gov). These documents may also be obtained for freefrom Anteon International Corporation by directing a request to AnteonInternational Corporation, Investor Relations, 3211 Jermantown Road,Fairfax, Virginia 22030-2801 or at Anteon International Corporation'sInvestor Relations page on its corporate website at www.anteon.com.