Foreign relations 18 Defenses 11 History 8 Military relations 7 Military policy 5 National security 5 Armed Forces 4 Politics and government 4 Security, International 4 World politics 4 Congresses 3 Economic aspects 3 Military art and science 3 North Atlantic Treaty Organization 3 World War, 1939-1945 3 Army 2 Campaigns 2 Europe 2 Islam 2 Nuclear warfare 2 Relations 2 Religion and politics 2 Special forces (Military science) 2 Strategy 2 Terrorism 2 Aerial operations 1 Afghanistan 1 Air Force 1 Air forces 1 Armored troops 1