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After the death of Brezhnev, his next two sucessors each dies after only a year in office. The Soviet Union is forced to find new leadership.
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Gorbachev becomes the youngest leader of the Soviet Union since Stalin. His reforms make the Soviet Union a more open society.
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Realizing the Soviet Union can no longer afford a costly arms race with the United States, Gorbachev signs the INF Treaty.
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In response to the declaration of independence, Gorbachev orders a violent crackdown that results in the death of unarmed civilians.
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Hardliners detain Gorbachev and demand he resign.
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Although the coup does not succeed, it greatly destabilised the Soviet Union.
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Gorbachev resigns and the Soviet Union ceases to exist.