On its way across Brittany, the 4th Armored became part of General Patton's Third Army when it became operational on 1 August 1944. By 9 August 1944 the 37th was approaching Lorient, on the southern edge of Brittany. On 14 August 1944 the siege of Lorient was turned over to the 6th Armored Division and the 37th turned eastward with the rest of the Third Army, which was beginning its historic race across France. VII Corps was the southernmost corps of the Third Army, 4th Armored Division was on the VII Corps southern flank, and the 37th Tank Battalion was protecting the southern flank of the division. There was nothing south of the 37th except the Loire River and the Germans.