 Ardaburius defeated the Sasanian commander Narseh and proceeded to plunder the province of Arzanene and lay siege to Nisibis.Ardaburius abandoned the siege in the face of an advancing army under Bahram, who in turn besieged Theodosiopolis (probably Theodosiopolis in Osroene).The peace treaty that ended the war (422) was negotiated by the "magister officiorum" Helio.