The operation also returned to the scenes of earlier mass killings such as Babi Yar, Ponary, the Ninth Fort, as well as Bronna Góra. By 1944, with Soviet armies advancing, Wilhelm Koppe, head of the "Reichsgau Wartheland", ordered that each of the five districts of General Government territory set up its own Aktion 1005 commando to begin "cleaning" mass graves. The operations were not entirely successful, as the advancing Soviet troops reached some of the sites before they could be cleared.