Oirat Mongol khanate founded when Güshi Khan conquered Tibet and installed the 5th Dalai Lama's Gelug school as the dominant religious-political authority, ruling the Tibetan Plateau (centered on the Kokonor/Qinghai region) as patron-protector of the Ganden Phodrang government.
The Dzungar Khanate invaded Tibet and killed the last khan, Lhazang Khan, in 1717, ending Khoshut rule over Tibet proper; the family's remaining base in Kokonor (Qinghai) was crushed by Qing forces after Lobsang Danjin's 1723-24 rebellion, ending Khoshut political power in 1724.
No dedicated English-language monograph on the Khoshut Khanate/Güshi Khan found on Open Library; van Schaik's standard scholarly one-volume history of Tibet covers the Güshi Khan conquest and the Khoshut-Gelug alliance as a distinct chapter. Verified fallback.