Although the territory initially formed a part of the Ober Ost military command under the authority of general Erich Ludendorff, after the military advances of the Central Powers in the fall offensive of 1915 the territory came under a separate administration in October.[1] 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 headquarters of the General Government operated in the Royal Castle, Warsaw, while the governor-general's seat was in the Belvedere palace, Warsaw.[2]