After the French capitulation, the 1st Army spent until mid-1944 protecting the Atlantic coast of France from a possible seaborne incursion. Following the successful Allied Normandy landings in June 1944, the 1st army was pushed back to the western border of the German Reich. and reorganized in Lorraine after a hasty retreat with the rest of the German forces across France, in August 1944, During the battles along the German frontier, the First Army attempted to prevent the Third United States Army from crossing the Moselle River and capturing Metz while also attempting to hold the northern Vosges Mountains against the Seventh United States Army.