Russian Tatars can be divided into three parts. The Tatar Republic, Siberian Tatars and Crimean Tatars now constitute the Tatars in the west. Their ancestors all came from the western expedition of Genghis Khan's gold family in Mongolia. Tatar, the word first appeared in the Song Dynasty, is a descendant of Rouran Tatan Khan, calling himself a tribe. After the Yuan Dynasty was destroyed by the Ming Dynasty, the Mongolian regime established the Northern Yuan regime, which was divided into two parts, one was the Wala regime in the west and the other was the Tatar regime in the east. After the Ming Dynasty, the Tatars were attacked by the Manchu army headed by Huang Taiji, the Nuzhen nationality, and basically withdrew from the historical stage at the beginning of the17th century.
Russia's Tatar Republic, formerly known as Kazan Khanate, was established after the collapse of the Golden Account Khanate established by Mongols. The Golden Account Khanate was founded by Batu, the eldest son of Temujin and the son of Shu Chi. Therefore, Russian Tatars are closely related to Mongolia's Western Expedition. According to the current investigation, it is found that the primitive Tatars in Russia came from the Vulgarbao people, not the largest Chincha people in the Golden Horde.
Mongolians had more ethnic integration with Volga people in the process of the Western Expedition. The people of this nation have retained more Mongolian ancestry. 1368, Badou's brother came to Russian territory again and established Kazan khanate. Tatars were the main ethnic group of Kazan khanate, and were annexed by the powerful Moscow Principality in the15th century, and the Tatars began to be under the rule of the Russian nation.