Ukrainian Soviet Socialist Republic
The Ukrainian Soviet Socialist Republic (Ukrainian SSR or UkrSSR or UkSSR; , УРСР ; , УССР ; see "Name" section below), also known as the Soviet Ukraine, was one of the constituent republics of the Soviet Union from the Union's inception in 1922 to its breakup in 1991. The republic was governed by the Communist Party of Ukraine as a unitary one-party socialist soviet republic.
Ukraine and the United Nations
Ukraine was one of the founding members of the United Nations when it joined in 1945 as the Ukrainian Soviet Socialist Republic; along with the Byelorussian Soviet Socialist Republic, Ukraine signed the United Nations Charter when they were part of the Soviet Union. After the dissolution of the Soviet Union in 1991, the newly-independent Ukraine retained its seat.