World War, 1939-1945 History 6,444 Campaigns 4,098 Guerre mondiale, 1939-1945 2,000 Regimental histories 1,223 Foreign relations 1,018 Politics and government 910 more ... Holocaust, Jewish (1939-1945) 900 Aerial operations, American 841 Jews 837 Diplomatic history 659 Underground movements 610 Naval operations 567 Histoire 527 Atrocities 519 Prisoners of war 509 Naval operations, American 494 Secret service 480 History, Military 453 Soldiers 412 Causes 404 Aerial operations 401 World War, 1914-1918 396 Weltkrieg 369 Prisoners and prisons, Japanese 361 Prisoners and prisons, German 356 Military campaigns 350 Armed Forces 338 Women 332 Submarine 318 less ...