Final answer:
Five countries that were controlled as part of the Iron Curtain are East Germany, Poland, Hungary, Romania, and Bulgaria, all of which were under Soviet influence and part of the Warsaw Pact during the Cold War.
Step-by-step explanation:
The term Iron Curtain refers to the geopolitical boundary that divided Europe into two separate areas from the end of World War II until the end of the Cold War in 1991. The Iron Curtain separated the communist nations of Eastern Europe, which were under the influence or control of the Soviet Union, from the capitalist democracies of Western Europe. The countries that found themselves on the eastern side of the Iron Curtain, controlled as part of this Soviet sphere, included:
- East Germany (German Democratic Republic or GDR)
- Poland
- Hungary
- Romania
- Bulgaria
These countries were part of the Warsaw Pact, the military alliance formed in response to the North Atlantic Treaty Organization (NATO), and were characterized by one-party communist rule.