Wehrkreis XX (Military District 20) with HQ at Danzig. It was carved out of occupied Poland and had not existed pre-war.
As of 10August1944 Camps were Stammlager XX A (Thorn-South), with OffzLager XX A, Stalag XX B (Marienburg, with 2 camps Oliva and Bischofsburg) and 357 Thorn-South.
Camp guards were provided by Landesshuetzen Btl 397 (Graudenz), 610 (Marienwerder), 714 (Thorn), 717 (Danzig) and1012 (Thorn-South).
Oflag = officers camp, Stalag = other ranks camp.