National security -- 218 Nationalism -- 99 Foreign relations -- 71 Politics and government -- 68 Politics and government 57 Terrorism -- 45 Foreign relations 44 more ... History -- 44 National security 42 Congresses -- 41 Congresses 40 History 40 World politics -- 35 Security, International 34 Military policy 30 United Nations -- 30 Armed Forces 25 Nationalism 22 Ethnic relations 18 International relations 18 Armed Forces -- 17 Strategic aspects 16 Prevention -- 15 International cooperation 14 Economic conditions 13 Prevention. -- 13 Defenses 12 Peace 12 Arms control -- 10 Relations -- 10 less ...