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.
Russia–Ukraine border
The Russian-Ukrainian border is the international state border between the Russian Federation (CIS member) and Ukraine, which formally has been in existence since Ukraine's independence from the Soviet Union, on August 24, 1991. Over land the border outlines five oblasts (regions) of Ukraine and five oblasts of the Russian Federation.