Khyargas Nuur

Khyargas Nuur lies in western Mongolia's Great Lakes basin. In the eighteenth century, the country around the lake became part of the resettlement of Bayad and Dorbet communities during the collapse of the Dzungar state. One Bayad banner was led by Sevden, a noble who followed the three Tserens into Qing allegiance in 1753. The Qing court recognised his hereditary authority over his followers the following year.

These communities did not reach their later homeland in a single movement. After staying around Zag and Baidrag, Sevden's followers returned toward the Irtysh, then fled renewed warfare and travelled through Khovd to the Ulaangom country in 1758. Their banner occupied the southeastern part of the Bayad territory around Khyargas Lake, adjoining the Sartsuul banner to the south. Sevden had died in 1756, and his son Baasan inherited his office. The lake's eighteenth-century setting thus included displaced communities, hereditary leaders and new banner boundaries established amid war and migration.