The Moldavian Soviet Socialist Republic or Moldavian SSR (Romanian: Republica Sovietică Socialistă Moldovenească, Moldovan Cyrillic: Република Советикэ Сочиалистэ Молдовеняскэ), also known as the Moldovan Soviet Socialist Republic, Moldovan SSR, Soviet Moldavia, Soviet Moldova, or simply Moldavia or Moldova, was one of the 15 republics of the Soviet Union which existed from 1940 to 1991. The republic was formed on 2 August 1940 from parts of Bessarabia, a region annexed from Romania on 28 June of that year, and parts of the Moldavian Autonomous Soviet Socialist Republic, an autonomous Soviet republic within the Ukrainian SSR.