Defenses National security -- 28 Military policy 25 Armed Forces 15 Politics and government -- 15 Foreign relations -- 10 World politics -- 9 more ... Military relations -- 8 Politics and government 8 Strategic aspects 8 Foreign relations 7 Arms control -- 6 Armed Forces -- 5 History -- 5 Security, International 5 Armed forces 4 Civil defense -- 4 National Security 3 National security 3 Terrorism -- 3 Air power -- 2 Appropriations and expenditures 2 Arms control 2 Defences 2 Defenses -- 2 Disarmament 2 Emergency management -- 2 History 2 International relations 2 Military relations 2 less ...