Semyon Timoshenko

Timoshenko was appointed People's Commissar for Defense of the Soviet Union in May 1940, replacing Kliment Voroshilov after the Winter War. He implemented reforms to modernize the Red Army, including mechanization and improved training, but was unable to complete them before the German invasion.

Timoshenko was appointed commander of the Western Direction in July 1941, responsible for the defense of Moscow. He oversaw the Battle of Smolensk, which delayed the German advance. However, his forces suffered heavy losses and were forced to retreat. He was later replaced by Zhukov.

Timoshenko commanded the Stalingrad Front during the initial stages of the Battle of Stalingrad. His forces conducted a fighting retreat into the city, but he was unable to prevent the German advance. He was relieved of command in July 1942 and replaced by more successful commanders.

Timoshenko was appointed commander of the Northwestern Front in 1943, where he conducted the Demyansk Offensive. The operation failed to achieve a decisive breakthrough, and Timoshenko was again reassigned. He spent the remainder of the war in less prominent roles.