While matters were in this state, and the consent of Balas to the terms agreed upon had not yet been positively signified, an important revolution took place at the court of Persia. Zareh, a son of Perozes, preferred a claim to the crown, and was supported in his attempt by a considerable section of the people. A civil war followed; and among the officers employed to suppress it was Nikhor, the governor of Armenia. On his appointment he suggested to Vahan that it would lend great force to the Armenian claims if under the existing circumstances the Armenians would furnish effective aid to Balas, and so enable him to suppress the rebellion. Vahan saw the importance of the conjuncture, and immediately sent to Nikhor’s aid a powerful body of cavalry under the command of his own nephew, Gregory. Zareh was defeated, mainly in consequence of the great valor and excellent conduct of the Armenian contingent. He fled to the mountains, but was pursued, and was very shortly afterwards made prisoner and slain. Soon after this, Kobad, son of Perozes, regarding the crown as rightfully his, put forward a claim to it, but, meeting with no success, was compelled to quit Persia and throw himself upon the kind protection of the Ephthalites, who were always glad to count among their refugees a Persian pretender. The Ephthalites, however, made no immediate stir--it would seem, that so long as Balas paid his tribute they were content, and felt no inclination to disturb what seemed to them a satisfactory arrangement.