The mass murder operations of '' Intelligenzaktion '' killed 100,000 Polish people ; by way of forced disappearance , the Nazis imprisoned and killed selected citizens of Polish society , identified before the war as enemies of the Reich ; they were buried in mass graves at remote places . To facilitate the depopulation of Poland , the Nazis terrorised the general populace with the public , summary executions of selected intellectuals and community leaders , before effecting the expulsions of the general population from occupied Poland . The executioners of the '' Einsatzgruppen '' death squads and the local '' Volksdeutscher Selbstschutz '' , the German-minority militia , pretended that their police-work was meant to eliminate politically dangerous people from Polish society
expulsions of the general population
Expulsion of Poles by Nazi Germany
Intelligenzaktion