Qasar

Qasar was the Mongol ulus descended from Genghis Khan's brother Jochi Qasar, whose pastures lay west of the Greater Khingan. In 1337 the Borjigin prince Shilieman ruled as a Yuan vassal.

The Fuyu Guard, one of the Ming Three Guards established in 1389, was said to descend from Qasar and became the ancestor of the Khorchin. Their Adai Khan challenged the Oirats and was killed in 1438; the Khorchin fought beside Dayan Khan at Dalan Terqin in 1510. In 1624 they submitted to Nurhaci, and Qing emperors later married Khorchin women, including Empress Xiaozhuangwen.