The Lithuanian Soviet Socialist Republic (Lithuanian: Lietuvos Tarybų Socialistinė Respublika; Russian: Литовская Советская Социалистическая Республика Litovskaya Sovetskaya Sotsialisticheskaya Respublika), also known as the Lithuanian SSR, was one of the republics that made up the former Soviet Union. It was established after the occupation and later annexation of Lithuania in 1940 and existed until 1990. Between 1941 and 1944, the German invasion of the Soviet Union caused its de facto dissolution. However, with the retreat of the Germans in 1944–1945, Soviet hegemony was re-established. There had been an unsuccessful attempt to establish a Soviet government in Lithuania by the Bolshevik Red Army in 1918–1919.