固始汗
The Geluk sect asked for help Törü Bayikhu (Güshi Khan), the leader of the Khoshut tribe of the Oirat confederation. In 1636 Törö Bayikhu led the Khoshuts and the Dzungars to Tibet. In the next year a decisive war between Tsogtu Khuntaiji and Törü Bayikhu ended in the latter's victory and Tsoghtu was killed.