World War, 1939-1945 History 522 Campaigns 308 Guerre mondiale, 1939-1945 268 Military campaigns 99 Holocaust, Jewish (1939-1945) 89 Histoire 88 more ... Aerial operations, American 75 Concentration camps 64 Campagnes et batailles 58 Photography 57 Jews 50 Atrocities 47 Regimental histories 47 Military operations, Aerial 43 HISTORY 42 Occupied territories 42 War photography 42 Documentary photography 35 Armed Forces 34 Weltkrieg 34 Destruction and pillage 33 Underground movements 31 Internment camps 30 Pictorial works 30 History, Military 28 American 27 Japanese Americans 27 World War, 1914-1918 27 Aerial operations 26 less ...