YES, of course don't u read something??? The Soviet Union became the primary model for future Communist states during the Cold War; the government and the political organization of the country were defined by the only permitted political party, the Communist Party of the Soviet Union.
Initially established as a union of four Soviet Socialist Republics, the USSR grew to contain 15 constituent or "union republics" by 1956: Armenian SSR, Azerbaijan SSR, Byelorussian SSR, Estonian SSR, Georgian SSR, Kazakh SSR, Kyrgyz SSR, Latvian SSR, Lithuanian SSR, Moldavian SSR, Russian SFSR, Tajik SSR, Turkmen SSR, Ukrainian SSR, and Uzbek SSR.[1] The republics were part of a highly centralized federal union that was dominated by the Russian SFSR.
During the USSR's collapse (and formal dissolution in December 1991), all 15 former SSRs ("union republics") became independent countries. These 15 countries are often dubbed, 'the former Soviet Union'.[2] Eleven of these states are aligned through a loose confederation known as the Commonwealth of Independent States (CIS). Turkmenistan, originally a full member of the CIS, is now an associate member. The three Baltic states (Estonia, Latvia, and Lithuania) did not join this Commonwealth; instead, they joined both the European Union and the NATO alliance in 2004. Russia and Belarus also belong to the Union of Russia and Belarus.