World War, 1939-1945 History 6,994 Campaigns 4,469 Guerre mondiale, 1939-1945 2,064 Regimental histories 1,242 Holocaust, Jewish (1939-1945) 1,075 Foreign relations 1,048 more ... Jews 965 Politics and government 949 Aerial operations, American 881 Underground movements 679 Diplomatic history 672 Atrocities 617 Naval operations 596 Histoire 552 Prisoners of war 549 Naval operations, American 523 Military campaigns 517 Secret service 500 Soldiers 475 History, Military 471 Aerial operations 448 World War, 1914-1918 427 Causes 419 Prisoners and prisons, German 384 Prisoners and prisons, Japanese 381 Weltkrieg 376 Women 375 Armed Forces 365 Rescue 339 less ...