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.
Act of restoration of the Ukrainian state
After World War I, Ukraine was divided into three parts: most of Central and Eastern Ukraine became the Ukrainian Soviet Socialist Republic in 1921. The capital was Kharkiv.