Complex sentence: Both at Neustadt and at Landau, remnants of two divisions of the "XIII SS Corps", including the "17th SS Panzer Grenadier Division", had held through the day, but early in the evening the defense collapsed.
Split into simpler sentences: Both at Neustadt and at Landau, remnants of two divisions of the XIII SS "Korps", including the 17. SS "Panzergrenadierdivision", had held through the day, but early in the evening the defense collapsed.