To the south of LXVII Armeekorps was I SS Panzer Corps, with 1st SS Panzer Division and 12th SS Panzer Division, 12th Volksgrenadier Division and 277th Volksgrenadier Division, and 3rd Fallschirmjäger Division. 1st SS Panzer Division had been formed from Adolf Hitler's personal bodyguard regiment. It had the primary responsibility for breaking through the Allied lines and reaching the Meuse River and then Antwerp. 12th SS Panzer Division was composed of junior officers and enlisted men who had been drawn from members of the Hitler Youth, while its senior non-commissioned officers and officers were generally veterans of the Eastern Front. I SS Panzer Corps was given the role of breaking through to an east–west road in the northern sector of the Ardennes, code-named Rollbahn B, through Spa. 3rd Fallschirmjäger Division and 12th Volksgrenadier Division were responsible for opening the way to Rollbahn D for SS Standartenführer Joachim Peiper's Kampfgruppe Peiper, the lead element of 1st SS Panzer Division.