Complex sentence: He then served as a Brigade Commander with the 4th Panzer Division (Germany) on the Eastern Front, from June 1942, however this Division was completely destroyed by February 1943 during the Battle of Stalingrad.
Split into simpler sentences: He then served as a Brigade Commander with the 4th Panzer Division (Germany) on the Eastern Front, from June 1942. However, this Division was completely destroyed by February 1943 during the Battle of Stalingrad.