History Sources United States 15 Politics and government 8 African Americans 6 Causes 6 Civil rights 6 Foreign relations 5 Race relations 5 World War, 1939-1945 5 Civilization 4 Soviet Union 4 Speeches, addresses, etc., American 4 World war, 1939-1945 4 Biography 3 Campaigns 3 History, Military 3 Personal narratives 3 Philosophy 3 Terrorism 3 1918-1945 2 Aerial operations, British 2 Armed Forces 2 Australia 2 Civil rights movements 2 Civilization, Western 2 Communism 2 Correspondence 2 Europe 2 France 2