Organized action aimed at exterminating the Polish population of the region however , began only after the end of the September campaign , with the Intelligenzaktion in Pomerania ( Intelligence Action Pomerania ) , a part of an overall Intelligenzaktion by Nazi Germany aimed at liquidating the Polish elite . Its main targets were the Polish intelligentsia , which was blamed by the Nazis for pro-Polish policies in the Polish corridor during the interwar period . Educated Poles were also perceived by the Nazis as the main obstacle to the planned complete Germanization of the region
Intelligenzaktion
Intelligenzaktion
Massacres in Piaśnica