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Of the fifteen Soviet republics eventually declared their independence
transforming their economies
Declared its independence from the Soviet Union 16th Dec 1991.
After regaining their independence from Russia (Soviet Union), they formed 3 alliances for protection: Peacekeeping Battalion (Baltbat); NATO; and the EU.
LITHUANIA IN 1990
15 republics declared independence and Soviet Union no longer existed.
All fifteen declared themselves independent in 1991.
The Baltic states (Lithuania, Latvia, and Estonia).
None, not while the Soviet Union existed.
In 1991! Before they declared their independence, they were part of Russia, or more specific The Soviet Union.
15 SSRs
In Eastern Europe, he Soviet Union made satellite Nations of those countries ordering it. Satellite Nations are dependent upon a stronger power. Bulgaria, Romania, Czechoslovakia, Hungary, Poland, and East Germany became communist.