The term "iron curtain" was first used by Winston Churchill in a 1946 speech to describe the Soviet Union's control over Eastern Europe. Churchill said, "From Stettin in the Baltic to Trieste in the Adriatic, an iron curtain has descended across the continent." The term quickly came to symbolize the division of Europe during the Cold War.
The iron curtain had a number of implications. First, it prevented the free movement of people and ideas between the Eastern Bloc and the Western Bloc. Second, it led to the creation of two separate economic systems: the capitalist system in the West and the communist system in the East. Third, it led to the development of two rival military alliances: NATO (the North Atlantic Treaty Organization) and the Warsaw Pact.
The iron curtain began to lift in the late 1980s, with the collapse of the Soviet Union and the Eastern Bloc. The reunification of Germany in 1990 marked the end of the Cold War and the beginning of a new era in European history.