Question

what is Soviet Union and causes of its disintegration​

Answer 1

The dissolution of the Soviet Union (1988–1991) was the process of internal disintegration within the Soviet Union, which began with growing unrest in its various constituent republics developing into an incessant political and legislative conflict between the republics and the central government, and ended when the ...

Answer 2

Answer:

Soviet Union

The Soviet Union, officially the Union of Soviet Socialist Republics (USSR), was a federal socialist state in Northern Eurasia that existed from 1922 to 1991. ... Its territory included much of Eastern Europe, parts of Northern Europe and Western Asia, and all of Central and North Asia.

causes of disintegration:

The dissolution of the Soviet Union (1988–1991)[b] was the process of internal disintegration within the Soviet Union, which began with growing unrest in its various constituent republics developing into an incessant political and legislative conflict between the republics and the central government, and ended when the leaders of three primal republics (the Russian SFSR, the Ukrainian SSR and the Byelorussian SSR) declared it no longer existed, later accompanied by 11 more republics, resulting in President Mikhail Gorbachev having to resign and what was left of the Soviet parliament formally acknowledging what had already taken place.