In the aftermath of
battle of Avarayr, the Armenians were constantly ordered by the Sasanians to go to distant military expeditions, mostly in Eastern Persia. They were also required to accept the growing power of the apostasy, which resulted in the revolt of
Vakhtang I of Iberia (r. 447/449 - 502/522), and was positively received by the Armenians. Vahan hesitated to join the rebellion in 481, making
Adhur Gushnasp, the
marzban of Armenia, abandon
Dvin and take refuge in
Artashat. Vahan then asked the other rebels to take an oath on the cross of the Gospel to remain faithful to the covenant he would proclaim as the new
marzban of Armenia, and proclaimed
Sahak II Bagratuni as the new
marzban. However, Adhur Gushnasp returned from refuge with a force of 7000 horsemen against the insurgents, he was, however, defeated and killed by Vahan and his army at the battle at
Akori (northern slope of
Mount Ararat). Vahan henceforth remained in
Dvin to protect the capital; in early 483, Sasanian reinforcements came, however, Vahan managed to defeat them at the battle of Nersehapat in Artaz (region of
Maku.) Vahan then received a letter from
Vakhtang, who was with his troops near the
Kura river searching after the Sasanian army under Shapur Mihran. Crazed by the lack of promised reinforcements, the Armenians were defeated in 483 at the battle of Akesga that among other consequences, caused the death of Sahak II Bagratuni and Vahan's brother, Vasak Mamikonian. Vahan then went to Tao while Shapur Mihran was returning to
Ctesiphon, allowing the Armenians regain control of the
Arax river during winter. In the spring of 484, Shapur Mihran returned as the head of a new army and forced Vahan to flee to refuge near the Byzantine frontier, at
Tao and
Taron. ==Marzban of Armenia==