Atrocities World War, 1939-1945 338 History 191 Polish people 82 Crimes against 71 Holocaust, Jewish (1939-1945) 50 Jews 47 more ... Ethnic relations 43 Guerre mondiale, 1939-1945 35 Katyn Massacre, Katynʹ, Russia, 1940 31 Genocide 20 Prisoners and prisons, German 20 Histoire 18 Atrocités 17 Massacres 17 Persecutions 16 Political persecution 16 Prisoners of war 16 Underground movements 16 Concentration camps 14 Nazi concentration camps 14 Relations 12 Atrocités 11 Politics and government 10 Children 8 Foreign relations 8 Nationalism 8 Ukrainians 8 War crimes 8 Anti-communist movements 7 less ...