structural:reformatting, stylistic:style_transfer, quality:corruption
Uzbek Khanate (1428)

After 1419, the Golden Horde functionally ceased to exist. Ulugh Muhammad was officially Khan of the Golden Horde but his authority was limited to the lower banks of the Volga where Tokhtamysh's other son Kepek also reigned. The Golden Horde's influence was replaced in Eastern Europe by the Grand Duchy of Lithuania, who Ulugh Muhammad turned to for support. The political situation in the Golden Horde did not stabilize. In 1422, the grandson of Urus Khan, Barak Khan, attacked the reigning khans in the west. Within two years, Ulugh, Kepek, and another claimant Dawlat Berdi, were defeated. Ulugh Muhammad fled to Lithuania, Kepek tried to raid Odoyev and Ryazan but failed to establish himself in those regions, and Dawlat took advantage of the situation to seize Crimea. Barak defeated an invasion by Ulugh Beg in 1427 but was assassinated the next year. His successor, Abu'l-Khayr Khan, founded the Uzbek Khanate.