The Russian Soviet Federative Socialist Republic (Росси́йская Сове́тская Федерати́вная Социалисти́ческая Респу́блика [РСФСР] Rossiyskaya Sovetskaya Federativnaya Sotsialisticheskaya Respublika [RSFSR]), also called the Russian Soviet Federated Socialist Republic, the Russian SFSR and the RSFSR for short, was the largest and most populous of the fifteen Soviet republics of the Soviet Union and became the Russian Federation after the collapse. It was by far the largest sub-national entity in the world by area and 2nd in population then and ever, after Uttar Pradesh, India. After the dissolution of the Soviet Union, Sichuan, China became the 2nd most populous subnational entity until 1997 when it was divided. RSFSR was established on November 7, 1917, and on July 10 1918 the 1918 Constitution was accepted. It became part of the Soviet Union in 1922, an act formalised by the 1924 Soviet Constitution. It was only internationally recognized by only a few states, the Irish Republic, Estonia, Finland, Latvia and Lithuania. The four last-mentioned countries recongnized the Soviet Russia in Treaty of Tartu, 1921. In English, the term Bolshevist Russia is commonly used for the period 1917-1922. In Russian official documents of the time it was referred to as Russian Republic (Российская Республика Rossiyskaya Respublika) and Soviet Republic (Советская Республика Sovetskaya Respublika). The capital was Moscow, also the capital of the Soviet Union. Nikita Khrushchev transferred Crimea from the Russian SFSR to the Ukrainian SSR in 1955. The country was run by the Chairman of the Presidium of the Supreme Soviet of the Russian SFSR, its most recent title. The Congress of Soviets of RSFSR voted to leave the Soviet Union on December 12, 1991. The country was renamed to Russian Federation on December 25.