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.
Ukrainian People's Republic of Soviets
The Ukrainian People's Republic of Soviets (1917–1918) was a short-lived Soviet republic of the Russian SFSR that was created by the declaration of the Kharkiv All-Ukrainian Congress of Soviets "About the self-determination of Ukraine" on in the Noble Assembly building in Kharkiv. The republic was later united into the Ukrainian Soviet Republic and, eventually, liquidated, because of a cessation of support from the government of the Russian SFSR when the Treaty of Brest-Litovsk was signed.