Cold War: A period of political tension between the United States and the USSR after World War II, characterized by ideological conflicts and arms races.
Communism: An economic and political system where all property is publicly owned, and each person works according to their ability while receiving according to their needs.
Iron Curtain: The term used to describe the division between communist Eastern Europe (controlled by the USSR) and democratic Western Europe (led by the United States) during the Cold War.