 However, he first had to fight “The Medes of the Mountains” - as we will see possibly in the mountain range of Gilan on the Caspian coast - and after subjugating them, he appointed his son Bahram (the later Bahram I) as their king.He then marched to the East and annexed most of the land of the Kushans, and appointing his son Narseh as Sakanshah - king of the Sakas - in Sistan.Shapur could now proudly proclaim that his empire stretched all the way to Peshawar, and his relief in Rag-i-Bibi in present-day Afghanistan confirms this claim.