World War, 1939-1945 History 1,440 Campaigns 544 Holocaust, Jewish (1939-1945) 408 Jews 375 Foreign relations 351 Politics and government 313 more ... Diplomatic history 230 Underground movements 169 Atrocities 152 Causes 137 Ethnic relations 127 Persecutions 117 Rescue 117 Aerial operations, American 108 Social aspects 108 Secret service 107 Social conditions 105 Prisoners of war 94 Economic aspects 93 Women 91 Influence 89 History, Military 86 Prisoners and prisons, German 85 World War, 1914-1918 79 History and criticism 78 Concentration camps 76 Peace 76 Soldiers 74 Japanese Americans 72 less ...