History 160 World War, 1939-1945 138 Campaigns 32 Holocaust, Jewish (1939-1945) 32 Military campaigns 32 Jews 20 Ethnic relations 16 more ... Armed Forces 13 Regimental histories 12 War 11 Collective memory 9 Military operations, Aerial 9 Underground movements 9 American 8 Concentration camps 8 Internment camps 8 Prisoners of war 8 Soldiers 8 Aerial operations, American 7 Atrocities 7 Refugees 6 Persecutions 5 Political aspects 5 Secret service 5 Antisemitism 4 Influence 4 Influence (Literary, artistic, etc.) 4 Race relations 4 Racism 4 Anti-Nazi movement 3 less ...