However, shortly after the coronation of the new king, Bahram Chobin marched to Ctesiphon and proclaimed himself king under the name of Bahram VI. Khosrau along with Vistahm, and Vinduyih fled to Byzantine territory, where promised emperor Maurice I to cede territory in exchange for military aid. One later year, Khosrau, along with Mushegh II and other nobles, marched towards Ctesiphon, and defeated Bahram, who then fled to Azerbaijan, and wrote a letter to Mushegh, urging him to betray Khosrau.