World War, 1939-1945 2,430 History 1,172 Campaigns 394 Holocaust, Jewish (1939-1945) 168 Social aspects 161 Politics and government 144 Jews 132 more ... Foreign relations 124 Social conditions 119 Atrocities 101 Influence 93 History and criticism 87 Regimental histories 85 Aerial operations, American 83 Prisoners of war 81 Soldiers 80 History, Military 73 Underground movements 73 Literature and the war 71 Refugees 66 Women 64 Diplomatic history 63 Political aspects 59 Secret service 58 World War, 1914-1918 58 Ethnic relations 56 Armed Forces 53 Concentration camps 53 Officers 53 Collective memory 50 less ...