Look up map with the "Iron Curtain Line" Churchill talked about.
Winston Churchill had been the Prime Minister of Great Britain during World War II. It was Churchill who coined the term Iron Curtain in a 1946 speech he delivered in Missouri. It refers to the fact that Eastern Europe was more or less controlled by the Soviet Union. Similarly, On March 5, 1946, Winston Churchill gave a speech declaring that an “iron curtain” had descended across Europe, pointing to efforts by the Soviet Union to block itself and its satellite states from open contact with the West.