Defenses -- Congresses 14 Economic aspects 14 National security -- 11 Congresses -- 9 Armed Forces -- 5 Periodicals 5 more ... Arms control -- 4 Foreign relations -- 4 Economic conditions -- 3 Military policy -- 3 Military relations -- 3 Politics and government -- 3 Appropriations and expenditures 2 Armed forces -- 2 Colonies -- 2 Congresses. -- 2 Defenses 2 Economic aspects -- 2 History 2 Military art and science -- 2 Periodicals -- 2 Security, International -- 2 Addresses, essays, lectures 1 Ammunitions -- 1 Armed Forces 1 Armed forces 1 Arms race 1 Asia -- 1 Congress -- 1 less ...