"Yazdegerd II (also spelled Yazdgerd II and Yazdgird II; Middle Persian: 𐭩𐭦𐭣𐭪𐭥𐭲𐭩), was the Sasanian King of Kings (shahanshah) of Iran from 438 to 457. He was the successor and son of Bahram V (r. 420–438).
His reign was marked by wars against the Eastern Roman Empire in the west and the Kidarites in the east, as well as by his efforts and attempts to strengthen royal centralisation in the bureaucracy by imposing Zoroastrianism on the non-Zoroastrians within the country, namely the Christians. This backfired in Armenia, culminating in a large-scale rebellion led by the military leader Vardan Mamikonian, who was ultimately defeated and killed at the Battle of Avarayr in 451. Nevertheless, religious freedom was subsequently allowed in the country." - (en.wikipedia.org 04.07.2021)
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