Setthathirat, after the departure from Chiang Mai of the Burmese army of occupation, returns to the city to regain the throne, which his father had secured and bequeathed to him, but he return of Bayinnaung prevents Setthathirat from gaining control.

Setthathirat allies with the Shans to achieve a victory but is eventually forced by the Burmese to fall back.