Bradley's Army Group now covered a very wide front in hilly country, from the Netherlands to Lorraine. Despite having the largest concentration of Allied army forces, Bradley faced difficulties in prosecuting a successful broad-front offensive in difficult country with a skilled enemy. General Bradley and his First Army commander, General Courtney Hodges eventually decided to attack through a corridor known as the Aachen Gap towards the German township of Schmidt. The only nearby military objectives were the Roer River flood control dams, but these were not mentioned in contemporary plans and documents. Bradley and Hodges' original objective may have been to outflank German forces and prevent them from reinforcing their units further north in the Battle of Aachen. After the war, Bradley would cite the Roer dams as the objective. Since the Germans held the dams, they could also unleash millions of gallons of water into the path of advance. The campaign's confused objectives, combined with poor intelligence resulted in the costly series of battles known as the Battle of Hurtgen Forest, which cost some 33,000 American casualties. At the end of the fighting in the Hurtgen, German forces remained in control of the Roer dams in what has been described as "the most ineptly fought series of battles of the war in the west." Further south, Patton's Third Army, which had been advancing with great speed, was faced with last priority (behind the U.S. First and Ninth Armies) for supplies, gasoline and ammunition. As a result, the Third Army lost momentum as German resistance stiffened around the extensive defenses surrounding the city of Metz. While Bradley focused on these two campaigns, the Germans were in the process of assembling troops and materiel for a surprise winter offensive.