Frost's 2nd Battalion of the British 1st Airborne Division had advanced into Arnhem and prepared defensive positions at the northern end of the bridge. They destroyed Gräbner's unit, which lost 12 vehicles out of 22 in the assault and around 70 men killed, including Gräbner. In all, the British 1st Airborne Division suffered 7,167 casualties out of 10,095 men. This action is depicted in the film A Bridge Too Far. Ardennes Offensive After the battle of Arnhem, Hohenstaufen moved to Paderborn for a much-needed rest and refit. On 12 December 1944, the division moved south to the Munstereifel. It was to act as a reserve for Sepp Dietrich's 6th SS Panzer Army, a part of the Ardennes offensive (Unternehmen: Wacht am Rhein). The 6th Panzer Army was to attack in the north, along the line St. Vith–Vielsalm. Initially, only the divisional reconnaissance and artillery units were involved in the fighting but on 21 December, the entire division was committed. The 9th SS Division tried to breakthrough defensive positions of the 82nd Airborne Division but failed. When the attack in the north stalled, the division was sent south to assist in the attacks on Bastogne, where it took heavy casualties from the American defenders and lost much of its equipment to Allied ground attack aircraft. On 7 January 1945, Hitler called off the operation and ordered all forces to concentrate around Longchamps, Belgium. Hungary and surrender Throughout the rest of January 1945, Hohenstaufen retreated to the German border. At the end of the month, the division was transferred to the Kaifenheim-Mayen area to be refitted. At the end of February, the division was sent east to Hungary as a part of the reformed 6th SS Panzer Army under Sepp Dietrich. The division, along with the majority of the SS Panzer units available, was to take part in Operation Spring Awakening, the offensive near Lake Balaton, which was aimed at relieving the forces encircled in Budapest by the Red Army. The attack got under way on 6 March 1945. Due to the condition of the roads, the division had not reached its jump-off position when the attack began. A combination of mud and stiff Soviet resistance brought the offensive to a halt and on 16 March a Soviet counter-offensive threatened to cut off the 6th SS Panzer Army. Hohenstaufen was involved in the fighting to escape the Soviet encirclement. During these actions,