Complex sentence: At the start of the invasion of the Soviet Union, Pliyev commanded the 50th Cavalry Division (renamed 3rd Guards Cavalry Division) during the Battle of Moscow and the Battle of Stalingrad.
Split into simpler sentences: At the start of the invasion of the Soviet Union, Pliyev commanded the 50th Cavalry Division (renamed 3rd Guards Cavalry Division). His unit participated in the Battle of Moscow and the Battle of Stalingrad.