In the company of the Dzungar prince Erdeni Batur, Güshi marched into Qinghai with 10,000 Oirat troops in 1636. In the next year he confronted the Khalkha forces of Choghtu Khung Tayiji, which were 30,000 strong and were opposed to the Gelugpa sect. The contest took place in the Kokonor Gorge and is known as the Battle of the Bloody Hill. The Choghtu troops were defeated and scattered, and the survivors had to surrender. Choghtu himself hid in a marmot hole but was found and killed on the spot. In that way the Khalkhas were suppressed in Tibet a short time after they were subjugated in Mongolia by the invading Manchu people.