Causes World War, 1939-1945 Foreign relations 8 History 7 Sources 4 World War, 1914-1918 4 1918-1945 3 Campaigns 3 United States 3 History 20th century 2 Juvenile literature 2 Political aspects 2 Politics and government 2 World war, 1939-1945 2 Balance of power 1 Breat Britain 1 Diplomatic history 1 East Asia 1 European war 1 Foreign Relations 1 Great Britain 1 Japan 1 Military aspects 1 Military intelligence 1 Military planning 1 Munich four 1 Pearl Harbor (Hawaii), Attack on, 1941 1 Pearl Harbor (Hwaii), Attacck on, 1941 1 Pearl Harbor, Attack on, 1941 1 Petroleum industry and track 1