Armed Forces 259 Periodicals 108 Veterans 104 Defenses 96 Appropriations and expenditures 86 Military policy 82 Research 76 more ... History 63 Military readiness 55 Procurement 51 Military education 49 Military art and science 46 National security 45 Agriculture 44 Military research 41 Law and legislation 37 Education 31 Supplies and stores 30 Aeronautics, Military 29 Defense contracts 29 Expenditures, Public 28 Foreign relations 27 Management 27 Medical care 27 Civil defense 26 Law reports, digests, etc 25 Services for 24 Geology 23 Soldiers 22 Finance 21 less ...