The Russian SFSR (Russian Soviet Federated Socialist Republic) (Russian: Росси́йская Сове́тская Федерати́вная Социалисти́ческая Респу́блика, РСФСР) was the largest and most populous of the fifteen former Soviet republics, and became the modern day Russia after the collapse of the Soviet Union.
Following the collapse of the Soviet Union in 1991, the RSFSR rejected a socialist system and went through reforms. It was renamed as the Russian Federation under the leadership of President Boris Yeltsin. The Commonwealth of Independent States (CIS), founded after the breakup of the USSR, loosely bound the former Soviet republics, except for Latvia, Lithuania and Estonia.
The Soviet Union was formed in December 1922 as a federal union of the RSFSR and those neighboring areas under its military occupation or ruled by branches of the communist movement.
Three-quarters of Soviet territory was in the RSFSR (two-thirds of that in Siberia and the Russian Far East) and 12 percent in Kazakhstan.
The Soviet Union, as heir to the former territory of the Russian Empire, was exceptionally diverse in its national composition.
With the dissolution of the Soviet Union in December 1991, the Russian SFSR ceased to exist, and the RussianFederation emerged as an independent country.
The RussianFederation is bounded on the N by the Arctic Ocean; on the E by the Pacific Ocean; on the S by China, Mongolia, Kazakstan, Azerbaijan, Georgia, and Ukraine; on the SW by Ukraine; on the W by Belarus, Latvia, Estonia; and on the NW by Finland.
In post-revolutionary Russia, the Union of SovietSocialistRepublics (USSR) is established, comprising a confederation of Russia, Belorussia, Ukraine,.