. . . . . . . . "Allies:" . . . . . "Sasanian civil war of 589\u2013591" . . . "Byzantine Empire" . "large-scale rebellion" . . "who had rebelled against Hormizd IV" . "The faction ofKhosrow IIemerges victorious" . "Supporters ofBahram Chobin" . . . "Sasanian civil war" . . . "Sasanian Empire" . "restore him to his throne" . . . . . . "Byzantine Empire( (590\u2013591)" . . "struggling against usurpers" . "Sasanian civil war of 589\u2013591" . . . "a Persian civil war" . . "Dissatisfied Sasanian nobles" . . . . . . . . .