 In the Siegfried Line on either side of Wissembourg, Germans of Petersen's XC "Korps" continued to fight in the pillboxes in a manner that belied the futility of their mission.The 14th Armored Division (Maj. Gen. Albert C. Smith) attacked into the Wissembourg Gap on 20 March and then fought Germans of the "XC Corps" over the possession of Steinfeld for the next two days.Both at Neustadt and at Landau, remnants of two divisions of the XIII SS "Korps", including the 17.