stylistic:style_transfer
Bashkortostan or Bashkiria, officially the Republic of Bashkortostan, is a republic of Russia between the Volga river and the Ural Mountains in Eastern Europe. The republic borders Perm Krai to the north, Sverdlovsk Oblast to the northeast, Chelyabinsk Oblast to the east, Orenburg Oblast to the south, Tatarstan to the west and Udmurtia to the northwest. It covers 143,600 square kilometres (55,400 square miles) and has a population of 4 million. It is the seventh-most populous federal subject in Russia and the most populous republic. Its capital and largest city is Ufa.

Bashkortostan was established on 28 November 1917. On 20 March 1919 it was transformed into the Bashkir ASSR, the first autonomous republic in the Russian SFSR. On 11 October 1990, it adopted the Declaration of State Sovereignty. In the Constitution of Bashkortostan and Constitution of Russia, Bashkortostan is defined as a state.