The Altan Khan ceased to exist after a series of defeats at the hands of their western neighbors the Oirat Dzungar Khanate in the late 17 century.
The 3rd Dalai Lama declared Abtai (1554 - 1588), grandson of Gersenji, Khan of the Tüsheet following their meeting at Guihua (present day Hohhot) in 1587.
In the years leading up to the meeting, Abtai had converted to Buddhism and founded Erdene Zuu, one of Mongolia's first Buddhist monasteries, near the ruins of Karakorum.
[4] After the Qing's victory over the Dzungars at the Battle of Jao Modo in 1697,[5] the three khanates became provincial subdivisions or aimags of the Manchus and their respective khans were made nominal leaders.
[6] The area of Tüsheet Khan aimag was also called "Khalka Rear Zam" (Mongolian: Халхын хойт зам, Chinese: 喀爾喀後路) by Qing dynasty.