Answer:
Serbs, Croatians, and Muslims were fighting
Answer: In World War 2, Russia was governed by the Soviet Union or more specifically, the Russian Soviet Federative Socialist Republic
Explanation:
The Iron Curtain referred to countries that Russia took over and acted as a buffer between Western Europe and Russia. Those nations included any country ending with -stan, Latvia, Estonia, and Yugoslavia.
The answer would be Joseph Stalin because he wanted an invasion in France which would lead up to the Battle of Normandy. Hope I could help!