From spring/summer 1944, the camp became the centre of a subcamp system of its own. Originally, these still were part of the Buchenwald system. With the creation of the "Jägerstab" (Fighter Staff), led by Speer, as an institution to oversee a boost to fighter plane production and the move of military production underground, facilities for the production of fighter planes for the Junkers company were to be created around Nordhausen – along with the necessary infrastructure. In addition, after the creation of the "Geilenbergstab" (named after Edmund Geilenberg), over the summer of 1944 more underground construction was requested for the German petroleum industry. Demand for workers for these projects was satisfied with concentration camp prisoners, but also with foreign forced labourers, POWs and drafted Germans.