Disintegration of the Empire
Internal divisions, the expansion of Moscow, the invasion by Timur, and the appearance of the Ottoman Turks contributed to the disintegration of the Tatar empire in the late 15th cent. The independent khanates of Kazan, Astrakhan, Sibir, and Crimea emerged. In the 16th cent. Russia conquered the khanates of Kazan, Astrakhan, and Sibir (Siberia); the khans of Crimea became (1478) vassals of the Ottoman Empire. Nevertheless Siberia long continued to be known as Tartary and the Crimean domains as Little Tartary. The Crimean Tatars continued to harass the Ukraine and Poland and to exact tribute from the czars of Russia; they raided Moscow in 1572.
The majority of the Tatars in Russia had by that time reached a relatively high degree of civilization. They were generally settled, were skillful in agriculture and crafts, and had great centers of Muslim learning. Only minorities, such as the Nogais, who were subject to the Crimean khans, remained nomadic. Tatar political leaders, administrators, and traders had a great influence on Russian history. Many Russian noble families were of partly Tatar origin. The social and military organization of the Muscovite state was influenced by the institutions of the Tatars, and many Russian customs are traceable to them.
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