 A force of three corps was to attack abreast from Saarbrücken, Germany, along a sector to a point southeast of Hagenau, France.A narrow strip along the Rhine leading to the extreme northeastern corner of Alsace at Lauterbourg was to be cleared by a division of the French First Army under operational control of the Seventh Army.The Seventh Army's main effort was to be made in the center up the Kaiserslautern corridor.