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Superpower and Cold War

After World War II, according to the Potsdam Conference, the Red Army occupied parts of Eastern and Central Europe, including East Germany and the eastern regions of Austria. Dependent communist governments were installed in the Eastern Bloc satellite states. After becoming the world's second nuclear power, the Soviet Union established the Warsaw Pact alliance, and entered into a struggle for global dominance, known as the Cold War, with the rivalling United States and NATO.