390 Division of Armenia between Persia and Rome by treaty. The division practically lasts until Arab times.
399 Assassination of Bahram. Yezdegerd or Jezdegird (I) the Sinner, son of Sapor I or Sapor II, succeeds. He is friendly to Rome, and Arcadius appoints him the guardian of his son Thedorius. He sets his son Sapor on the throne of Pers-Armenia.
420 Death of Yezdegerd, probably slain by the nobles. Sapor hurries from Armenia to take throne, but is slain. A certain Khosrau or Chosroes is made king, but another son of Yezdegerd, Bahram or Varanes (V) the Wild Ass, succeeds in getting the throne, with the help of the Arabs, among whom he has been living in exile. This is the first intervention of the Arabs in the affairs of Persia.
421 War breaks out with Rome, probably instigated by the nobles hostile to the king. Persians defeated, and
422 peace is made, giving religious freedom to Christians in Persia, and to Zoroastrians in the Roman Empire. There is constant warfare with Hephthalites or White Huns during this reign.
429 Bahram reduces Pers-Armenia to a province.
438 or 439 Bahram succeeded by his son, Yezdegerd II, who is cruel to the Jews and Christians. He suffers severe defeats from the White Huns.
451 A severe rebellion, due to religious persecutions, breaks out in Pers-Armenia, and is quelled with difficulty.
457 Death of Yezdegerd, and contest for the throne, between his two sons, Hormuz III and Peroz or Peroses. The latter is finally successful, owing to assistance from the White Huns. Peroz persecutes Jews and Christians, but favours the Nestorians, when they are driven from Rome.
484 Defeat and death of Peroz in a great battle with the White Huns, with whom he has been at war for some years. Revolt in Armenia put down by Zarmihr. Balash, Peroz’s brother, made king. He puts his brother, Zareh, a claimant of the throne, to death.