-
Period: to
.
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USSR enters war with Afghanistan
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Reagan becomes president
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Strategic Defensive Initiative enacted
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Gorbachev becomes General Secretary of the Communist Party
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Glasnost and Perestroika are introduced
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Chernobyl nuclear accident
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INF Treaty is signed
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The last Soviet troops leave Afghanistan
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Berlin Wall falls
-
500 Day Plan enacted
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All remaining Soviet states secede from the USSR