Valley of Death ( ) in Fordon , Bydgoszcz , northern Poland , is a site of Nazi German mass murder committed at the beginning of World War II and a mass grave of 1,200 – 1,400 Poles and Jews murdered in October and November 1939 by the local German '' Selbstschutz '' and the Gestapo . The murders were a part of Intelligenzaktion in Pomerania , a Nazi action aimed at the elimination of the Polish intelligentsia in Reichsgau Danzig-West Prussia , which included the former Pomeranian Voivodeship ( " Polish Corridor " ) . It was part of a larger genocidal action that took place in all German occupied Poland , code-named Operation Tannenberg
Operation Tannenberg
Operation Tannenberg
Valley of Death (Bydgoszcz)