Although initially a part of the Ober Ost military command under the authority of general Erich Ludendorff, after the military advances in the fall offensive of 1915 the territory was turned over to a separate administration in October. It continued to exist even after the later establishment of a rump Kingdom of Poland, a Central Powers puppet state. Its governor-general, Hans Hartwig von Beseler, held his office for the entire duration of the region's existence. The seat of the General Government was located in the Royal Castle, Warsaw, while the governor-general's seat was in the Belvedere palace, Warsaw.