 Extending the line to the Rhine was the XC Korps ("General der Infanterie" Erich Petersen) with two "volksgrenadier" divisions and remnants of an infantry training division.Although the Germans worried most about a breakthrough in the sector of Petersen's XC "Korps" into the Wissembourg Gap rather than through Simon's XIII SS "Korps" into the Kaiserslautern corridor, the shifts and countershifts made in preceding weeks to salvage reinforcements for the 7.