United States Foreign relations 22 History 20 Biography 19 Military policy 16 Politics and government 11 Armed Forces 6 National security 6 World War, 1939-1945 6 Congresses 5 Generals 4 Personal narratives 4 Relations 4 Soviet Union 4 Terrorism 4 Campaigns 3 Great Britain 3 Intelligence service 3 Social aspects 3 World war, 1939-1945 3 20th century 2 American 2 Army 2 Atomic weapons 2 Businessmen 2 Cold War 2 Decision making 2 Foreign relation 2 Imperialism 2 Intelligence officers 2