World War, 1939-1945 338 History 246 Campaigns 65 History, Modern 45 Histoire 44 World War, 1914-1918 40 World politics 38 more ... World history 36 Holocaust, Jewish (1939-1945) 27 Aerial operations, American 24 Guerre mondiale, 1939-1945 24 Middle Ages 23 Philosophy 23 Secret service 23 History, Ancient 19 Historiography 18 Jews 18 Biography 16 Naval operations 16 Weltkrieg (1939-1945) 16 Civilization 15 Politics and government 15 Prisoners of war 13 Causes 12 Naval operations, American 12 Prisoners and prisons, German 12 Underground movements 12 Aerial operations 11 Description and travel 11 Pearl Harbor (Hawaii), Attack on, 1941 11 less ...