Complex sentence: This was due to a misunderstanding concerning a retreat order issued by Weidling as commander of the LVI Panzer Corps; he had been appointed commander of the unit on 20 April, replacing Lieutenant-Colonel ("Oberstleutnant") Ernst Kaether as commander of Berlin.
Split into simpler sentences: This was due to a misunderstanding concerning a retreat order issued by Weidling as commander of the LVI Panzer Corps. Weidling replaced Lieutenant-Colonel ("Oberstleutnant") Ernst Kaether as commander of Berlin.