The success of Tiridates at the first was such as might have been expected from the forces arrayed in his favor. He defeated two Persian armies in the open field, drove out the garrisons which held the more important of the fortified towns, and became undisputed master of Armenia. He even crossed the border which separated Armenia from Persia, and gained signal victories on admitted Persian ground. According to the native writers, his personal exploits were extraordinary; he defeated singly a corps of giants, and routed on foot a large detachment mounted on elephants! The narrative is here, no doubt, tinged with exaggeration; but the general result is correctly stated. Tiridates, within a year of his invasion, was complete master of the entire Armenian highland, and was in a position to carry his arms beyond his own frontiers.
Such seems to have been the position of things, when Varahran II. suddenly died, after a reign of seventeen years,52 A.D. 292. He is generally said to have left behind him two sons, Varahran and Narsehi, or Narses, of whom the elder, Varahran, was proclaimed king. This prince was of an amiable temper, but apparently of a weakly constitution. He was with difficulty persuaded to accept the throne, and anticipated from the first an early demise. No events are assigned to his short reign, which (according to the best authorities) did not exceed the length of four months. It is evident that he must have been powerless to offer any effectual opposition to Tiridates, whose forces continued to ravage, year after year, the north-western provinces of the Persian empire. Had Tiridates been a prince of real military talent, it could scarcely have been difficult for him to obtain still greater advantages. But he was content with annual raids, which left the substantial power of Persia untouched. He allowed the occasion of the throne's being occupied by a weak and invalid prince to slip by. The consequences of this negligence will appear in the next chapter. Persia, permitted to escape serious attack in her time of weakness, was able shortly to take the offensive and to make the Armenian prince regret his indolence or want of ambition. The son of Chosroes became a second time a fugitive; and once more the Romans were called in to settle the affairs of the East. We have now to trace the circumstances of this struggle, and to show how Rome under able leaders succeeded in revenging the defeat and captivity of Valerian, and in inflicting, in her turn, a grievous humiliation upon her adversary.