- How did the Soviet Union formed the Soviet Union was formed by countries like Russia, Estonia, Latvia, Lithuania, Belarus, Ukraine, Moldova, Georgia, Armenia, Azerbaijan, Kazakhstan, Uzbekistan, Turkmenistan, Kyrgyzstan, Tajikistan and it was formed in the year December 30, 1922 to December 26, 1991. Another historic fact is why did the Soviet Union fell it was because the unsuccessful August 1991 coup against Gorbachev sealed the fate of the Soviet Union. Planned by hard-line Communist, the coup diminished the Gorbachev's power and propelled Yeltsin and the democratic forces to the forefront of the Soviet and Russian politics
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