Final answer:
The final collapse of the Soviet Union occurred in 1991, marking the end of the Cold War era.
Step-by-step explanation:
The final collapse of the Soviet Union occurred in 1991.
It was during this year that the Soviet Union, which was a communist state, dissolved after a series of political, economic, and social changes. The collapse of the Soviet Union marked the end of the Cold War era and had significant implications for both national and international politics.
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