Dziemiany was a royal village of the Polish Crown, administratively located in the Tczew County in the Pomeranian Voivodeship.

Several weeks later on 26 October 1939 by a decree of Adolf Hitler the region was annexed into the Reich as Reichsagau Danzig Westpreussen.

[3] In the fall of 1943 during Operation Barbarossa the Germans began constructing military range called the Truppenübungsplatz Westpreußen in Dziemiany and neighbouring villages on an area of 700 square kilometres (270 sq mi).

The range was designed for training of the new SS Sturm brigades including Waffen-SS, as well as rocket testing.

Also notable was the group of about 500 Jewish women kept at the sub-camp in Dziemiany (Sophienwalde) employed to service the SS soldiers.