World War, 1939-1945 History 6,692 Campaigns 4,293 Guerre mondiale, 1939-1945 2,027 Regimental histories 1,233 Foreign relations 1,033 Holocaust, Jewish (1939-1945) 1,019 more ... Politics and government 929 Jews 922 Aerial operations, American 870 Diplomatic history 665 Underground movements 662 Naval operations 583 Atrocities 574 Histoire 536 Prisoners of war 533 Naval operations, American 513 Secret service 488 History, Military 459 Soldiers 459 Aerial operations 417 Causes 414 World War, 1914-1918 407 Prisoners and prisons, Japanese 376 Prisoners and prisons, German 372 Weltkrieg 371 Military campaigns 369 Women 357 Armed Forces 345 Rescue 326 less ...