World War, 1939-1945 History 3,867 Campaigns 1,549 Holocaust, Jewish (1939-1945) 764 Jews 645 Foreign relations 567 Politics and government 548 more ... Social aspects 375 Atrocities 369 Diplomatic history 356 Underground movements 356 Social conditions 314 Aerial operations, American 292 Prisoners of war 255 Regimental histories 252 Soldiers 241 History, Military 240 Influence 231 Secret service 227 Ethnic relations 224 Women 221 History and criticism 215 Rescue 212 Concentration camps 211 Causes 208 Prisoners and prisons, German 185 World War, 1914-1918 185 Refugees 181 Naval operations 178 Aerial operations, British 175 less ...