What series of events led to the end of the Cold War?

During 1989 and 1990, the Berlin Wall came down, borders opened, and free elections ousted Communist regimes everywhere in eastern Europe. In late 1991 the Soviet Union itself dissolved into its component republics. With stunning speed, the Iron Curtain was lifted and the Cold War came to an end.

Explanation:

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i think it was   tsar alexander ii

answer; i believe the correct answer is (desert storm);