To maximize the speed of the operation, and to avoid potential bottlenecks and logistical confusion, the two armored divisions of 1st SS Panzer Corps were assigned separate routes west. 12th SS Panzer Division was to utilize three routes (Rollbahn A, B and C) to the north through Elsenborn, Bütgenbach, Malmedy, Spa, and Liège. 1st SS Panzer Division was given two routes in the south (Rollbahn D and E) through Losheim, Lieugneville, Vielsalm, Werbomont, and Huy. The German plan of advance included Rollbahn A passing through a crossroads in the center of Rocherath and Rollbahn B skirting the southern edge of Krinkelt and continuing on toward Wirtzfeld. The Germans' first objective was to break through the defending line of the inexperienced 99th Infantry Division and the positions of the battle-hardened 2nd Infantry Division. Once they broke through the Americans, they needed to seize Elsenborn Ridge so they could control the roads to the south and west and ensure supply to the German troops.