Galdan Boshugtu Khan
Chahundorji succeeded to Tushiyetu Khan's (Tusheet Khan) throne in 1665. Zasagtu Khan Norbo (Norvo) died in 1661 and rivalry started between his successors. This feud eventually involved Altan Khan, Tushiyetu Khan, and the Dzungar Khanate. The crisis continued for decades and evolved into a war between Khalkha and Dzungaria in 1688, leading to the conquest of Khalkha by Galdan Boshugtu Khan, king of the Dzungar Khanate, in the course of several battles in the Hangai mountains.