The fifth day of Unternehmen Wacht am Rhein saw the battle reach its crisis point. Field Marshal Model and General von Manteuffel formally shifted the offensive’s main effort (Schwerpunkt) from the 6. SS-Panzerarmee to the 5. Panzerarmee, acknowledging the complete failure of the northern thrust. Kampfgruppe Peiper was now completely surrounded at La Gleize and Stoumont, attacked from three directions, while Panzer-Brigade 150 launched its first attack on Malmedy, which was halted by American artillery.
Eisenhower placed the US First and Ninth Armies under Field Marshal Montgomery’s command, a decision that caused lasting friction with General Bradley. Montgomery moved XXX Corps behind the Meuse as a reserve force. American forces attacked Kampfgruppe Peiper from three directions: the 3rd Armored Division from the north, the 82nd Airborne Division from the south at Cheneux, and the 30th Infantry Division from the west.