On 1 September 1944, Manteuffel was promoted to General of Panzer Troops and given command of the 5th Panzer Army on the Western Front, which took part in the Ardennes Offensive. Manteuffel's 5th Panzer Army achieved one of the deepest penetrations of Allied lines during the offensive, almost reaching the Meuse River, and engaging the U.S. forces at the Battle of Bastogne. On 10 March 1945 Manteuffel was made the commander of the 3rd Panzer Army on the Eastern Front, attached to Army Group Vistula. His army was assigned to defend the banks of the Oder River north of the Seelow Heights. On 25 April the Soviet 2nd Belorussian Front broke through Third Panzer Army's line, forcing a German retreat. On 3 May 1945 Manteuffel surrendered his troops to the British Army at Hagenow, Germany.