Sinews of Peace

The Iron Curtain was the name for the boundary dividing Europe into two separate areas from the end of World War II in 1945 until the end of the Cold War in 1991. The term symbolizes the efforts by the Soviet Union to block itself and its satellite states from open contact with the West and non-Soviet-controlled areas. On the east side of the Iron Curtain were the countries that were connected to or influenced by the Soviet Union. Separate international economic and military alliances were developed on each side of the Iron Curtain:

Physically, the Iron Curtain took the form of border defenses between the countries of Europe in the middle of the continent. The most notable border was marked by the Berlin Wall and its Checkpoint Charlie, which served as a symbol of the Curtain as a whole.

The events that demolished the Iron Curtain started in discontent in Poland, and continued in Hungary, the German Democratic Republic (East Germany), Bulgaria, Czechoslovakia, and Romania. Romania became the only communist state in Europe to overthrow its totalitarian government with violence.

The use of the term iron curtain as a metaphor for strict separation goes back at least as far as the early 19th century. It originally referred to fireproof curtains in theaters. Although its popularity as a Cold War symbol is attributed to its use in a speech Winston Churchill gave in March 1946 in Fulton, Missouri, German Minister of Propaganda Joseph Goebbels had already used the term in reference to the Soviet Union.

...
Wikipedia