When Patton did his big shift to the north why didn’t the Germans counter attack in his southern sector? When an army is wheeling to the left or right it is very vulnerable to being flanked.
They probably just didn’t have enough resources left.
Which lends credence to Eisenhower’s wide front strategy.
They probably had no reserves to follow up as everything was in the Ardennes Offensive. It was a Hail Mary, a violent but narrow push to cut off the Americans from the British and take Antwerp ruining the Spring push into Germany.