Complex sentence: He was promoted to the rank of Generalmajor in 1936 and in 1938, was given command of the 1st Light Division (later 6th Panzer Division), an early panzer unit that was part of the nucleus of the expanding German "Panzerwaffe".
Split into simpler sentences: He was promoted to the rank of "Generalmajor" in 1936 and in 1938, was given command of the 1. Lichtedivision, (1st Light Division), an early panzer unit that was part of the nucleus of the expanding German "Panzerwaffe".