At some point Fordon was located in the Grand Duchy of Posen and later under direct Prussian control . It was returned to Poland at the end of the First World War . In 1939 it was incorporated by the Third Reich . It is estimated that during World War II German soldiers killed from 1200 to 3000 people , mainly Poles and Jews , in the Death Valley of Fordon ( Valley of Death ( Bydgoszcz ) ) . The exact number stays unknown as historians have not found appropriate documents that would state the final number of deaths . Finally in 1945 Fordon was liberated from Nazi occupation
Valley of Death ( Bydgoszcz )
Valley of Death (Bydgoszcz)
Fordon (Bydgoszcz district)