"Korps-Abteilung D" was reformed, once more as the 56th Infantry Division, in East Prussia on 10 September 1944.The Soviet East Prussian Offensive in January 1945 pushed Third Panzer Army west towards Königsberg, and the division was finally encircled and destroyed in the Heiligenbeil pocket, only around 250 men managing to break out westwards to Pomerania (the divisional staff, along with that of 18th Panzergrenadier Division, reformed as the staff of the "Ulrich von Hutten" Division, which participated in the Battle of Halbe).