 Shapur I died in 270, and was succeeded by his son Hormizd I, who only reigned for a year before he died.Bahram I, with the aid of the powerful Zoroastrian priest Kartir, ascended the throne.He then made a settlement with his brother Narseh to give up his entitlement to the throne in return for the governorship of the important frontier province of Armenia, which was constantly the source of war between the Roman and Sasanian Empires.