Answer:
At the Battle of the Bulge.
Step-by-step explanation:
The Battle of the Bulge took place between December of 1944 and January of 1945.
It was the last major offense launched by the Germans in the West front. The intention of the Germans was to cut the Allies line and to stop them for using the port of Antwerp. By cutting the lines they would surround four armies and used them to negotiate a peace treaty.
The attack was through the forest of Ardennes in Belgium and was the fight that caused more casualties from the United States Army in the entire war.
I hope this answer helps you.