Diplomatic relations 88 Foreign relations 88 National security 73 Armed Forces 51 Politics and government 45 Military policy 39 Defenses 32 Military relations 31 Security, International 28 Military planning 13 Terrorism 12 World politics 12 History 10 Strategic aspects 10 Strategic aspects of individual places 10 Information warfare 9 Nuclear arms control 9 Information technology 8 Nuclear nonproliferation 8 Nuclear weapons 8 Prevention 8 Foreign economic relations 7 International economic relations 7 International police 7 International relations 7 Relations 7 Weapons of mass destruction 7 Appropriations and expenditures 6 Command and control systems 6 Deterrence (Strategy) 6