1940s- Joseph Stalin was the leader of the USSR after Lenin. He was a harsh, overbearing, and repressive ruler who murdered over 10 million Soviet citizens in gulags. He was also responsible for officially beginning WW2 when he invaded East Poland.
Georgy Zhukov. "Father" of the Soviet victory - a mastermind behind the largest battles of WW2: Moscow, the greatest battle in human history with 7 million officers and men taking part on both sides, Stalingrad (4m) and Berlin 3.5m to name a few. Without a doubt, a military genius: he never lost a battle. But also known by his soldiers as a “Butcher”, for disregarding causalities with his efforts to win at any cost.