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      <Form990PartVIISectionAGrp>
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          <USAddress>
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      <ContractorCompensationGrp>
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      <ContractorCompensationGrp>
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          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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      <TotalBookValueLandBuildingsAmt>201740</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>FINANCE LEASE LIABILITY</Desc>
        <Amt>90797</Amt>
      </OtherLiabilitiesOrgGrp>
      <OtherLiabilitiesOrgGrp>
        <Desc>OPERATING LEASE LIABILITY</Desc>
        <Amt>487046</Amt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueNotReportedAmt>348131</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>8244937</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>8244937</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>7047906</TotExpnsEtcAuditedFinclStmtAmt>
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      <ExpensesNotReportedAmt>348131</ExpensesNotReportedAmt>
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      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>6699775</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE INSTITUTE ACCOUNTS FOR THE EFFECT OF ANY UNCERTAIN TAX POSITIONS BASED ON A "MORE LIKELY THAN NOT" THRESHOLD TO THE RECOGNITION OF THE TAX POSITIONS BEING SUSTAINED BASED ON THE TECHNICAL MERITS OF THE POSITION UNDER SCRUTINY BY THE APPLICABLE TAXING AUTHORITY. IF A TAX POSITION OR POSITIONS ARE DEEMED TO RESULT IN UNCERTAINTIES OF THOSE POSITIONS, THE UNRECOGNIZED TAX EFFECT IS ESTIMATED BASED ON A "CUMULATIVE PROBABILITY ASSESSMENT" THAT AGGREGATES THE ESTIMATED TAX LIABILITY FOR UNCERTAIN TAX POSITIONS. INTEREST AND PENALTIES, IF ANY, ARE ACCRUED AS A COMPONENT OF GENERAL AND ADMINISTRATIVE EXPENSES WHEN ASSESSED. THE INSTITUTE IS A NOT-FOR-PROFIT ORGANIZATION THAT IS EXEMPT FROM INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AND CLASSIFIED BY THE INTERNAL REVENUE SERVICE AS OTHER THAN A PRIVATE FOUNDATION. SIMILAR TO OTHER TAX-EXEMPT ORGANIZATIONS, THE INSTITUTE IS SUBJECT TO TAX ON UNRELATED BUSINESS INCOME. TAX YEARS PRIOR TO 2021 ARE NO LONGER SUBJECT TO EXAMINATION BY TAXING AUTHORITIES.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FUNDRAISING DIRECT COSTS 317,738. LOSS ON DISPOSAL OF FINANCE LEASE 30,393.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FUNDRAISING DIRECT EVENTS 317,738. LOSS ON DISPOSAL OF FINANCE LEASE 30,393.</ExplanationTxt>
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      <InPersonSolicitationsInd>X</InPersonSolicitationsInd>
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        <GrossReceiptsAmt>0</GrossReceiptsAmt>
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        <Event1Nm>PC DINNER</Event1Nm>
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        <FoodAndBeverageEvent1Amt>117898</FoodAndBeverageEvent1Amt>
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        <FoodAndBeverageTotalEventsAmt>117898</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>45463</EntertainmentTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>153377</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>317738</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>-5398</NetIncomeSummaryAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>ISW'S STIPEND PROGRAM WAS STARTED TO SUPPORT STUDENTS THAT CHOOSE TO PARTICIPATE IN ISW'S HERTOG WAR STUDIES PROGRAM. RECIPIENTS RECEIVE FUNDS TO HELP OFFSET EDUCATIONAL AND LIVING EXPENSES SO THAT THEY CAN FOCUS ON WAR STUDIES PROGRAM REQUIREMENTS AND DEVELOPING THE SKILLS THEY WILL NEED TO PURSUE A CAREER IN NATIONAL SECURITY.</ExplanationTxt>
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        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>BRIAN BABCOCK-LUMISH</PersonNm>
        <TitleTxt>DIRECTOR, PETRAEUS CENTER</TitleTxt>
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        <OtherCompensationFilingOrgAmt>15000</OtherCompensationFilingOrgAmt>
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          <PersonNm>DR FREDERICK KAGAN</PersonNm>
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        <TransactionAmt>20000</TransactionAmt>
        <TransactionDesc>PAYMENTS MADE AS INSTRUCTOR FOR HERTOG WAR STUDIES PROGRAM</TransactionDesc>
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      </BusTrInvolveInterestedPrsnGrp>
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    <IRS990ScheduleM documentId="RetDoc1042900001">
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        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>DONATED SOFTWARE</Desc>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>171432</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>ESTIMATED VALUE</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>0</ReviewProcessUnusualNCGiftsInd>
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    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>990 IS PRESENTED TO THE BOARD FOR REVIEW AND APPROVAL PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANY POTENTIAL CONFLICTS OF INTEREST ARE PRESENTED TO THE BOARD BEFORE DISCUSSION BY THE BOARD PERTAINING TO THE BUSINESS OR INDIVIDUAL.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SALARY OF THE PRESIDENT IS REVIEWED AND SET BY THE BOARD OF DIRECTORS ANNUALLY AT A REGULARLY SCHEDULED MEETING OF THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>ISW MAKES PUBLIC DISCLOSURE DOCUMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>OUTSIDE CONTRACT SERVICES: PROGRAM SERVICE EXPENSES 405,410. MANAGEMENT AND GENERAL EXPENSES 361,291. FUNDRAISING EXPENSES 15,845. TOTAL EXPENSES 782,546.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C:</FormAndLineReferenceDesc>
        <ExplanationTxt>NEITHER THE OVERSIGHT PROCESS NOR THE SELECTION PROCESS HAS CHANGED DURING THE CURRENT TAX YEAR.</ExplanationTxt>
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    </IRS990ScheduleO>
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</Return>