High Quality Content by WIKIPEDIA articles! Oflag XXI-B and Stalag XXI-B were World War II German prisoner-of-war camps for officers and enlisted men, located at Szubin a few miles south of Bydgoszcz, in Pomorze, Poland, which at that time was occupied by Nazi Germany. September 1940 - The camp was built around a Polish boys' school by adding barracks. Initially it was Stalag XXI-B to accommodate Polish soldiers captured during the Invasion of Poland (1939). These prisoners were used for the expansion of the camp. December 1940 - the camp was split and Polish officers, previously held together with enlisted men in other camps, were moved here and part of the camp was renumbered Oflag XXI-B.