 This republic was dissolved in 1945, and the Crimea became an oblast first of the Russian SSR (1945–1954) and then the Ukrainian SSR (1954–1991).From 1991 the territory was covered by the Autonomous Republic of Crimea and Sevastopol City within independent Ukraine.However, during the 2014 Crimean crisis, the peninsula was taken over by Russia and a referendum on whether to rejoin Russia was held.