Chosroes seems to have had no son of sufficient age to succeed him, and the defence of the country fell upon the satraps, or governors of the several provinces.
These chiefs implored the aid of the Roman emperor, and received a contingent; but neither were their own exertions nor was the valor of their allies of any avail.

Artaxerxes easily defeated the confederate army, and forced the satraps to take refuge in Roman territory.

Armenia submitted to his arms, and became an integral portion of his empire.
It probably did not greatly trouble him that Artavasdes, one of the satraps, succeeded in carrying off one of the sons of Chosroes, a boy named Tiridates, whom he conveyed to Rome, and placed under the protection of the reigning emperor.
Such were the chief military successes of Artaxerxes.

The greatest of our historians, Gibbon, ventures indeed to assign to him, in addition, "some easy victories over the wild Scythians and the effeminate Indians." But there is no good authority for this statement; and on the whole it is unlikely that he came into contact with either nation.

His coins are not found in Afghanistan; and it may be doubted whether he ever made any eastern expedition.