The khanate experienced violent internal political disorder beginning in 1359, before it briefly reunited (1381–1395) under Tokhtamysh. However, soon after the 1396 invasion of Timur, the founder of the Timurid Empire, the Golden Horde broke into smaller Tatar khanates which declined steadily in power. At the start of the 15th century, the Horde began to fall apart. By 1466, it was being referred to simply as the "Great Horde". Within its territories there emerged numerous predominantly Turkic-speaking khanates. These internal struggles allowed the northern vassal state of Muscovy to rid itself of the "Tatar Yoke" at the Great Stand on the Ugra River in 1480. The Crimean Khanate and the Kazakh Khanate, the last remnants of the Golden Horde, survived until 1783 and 1847 respectively.