Chosroes, the Persian vassal, reigned over the Eastern and most extensive portion of the country; while the Western province acknowledged the jurisdiction of Arsaces, and the supremacy of the emperor Arcadius.

After the death of Arsaces, the Romans suppressed the regal government, and imposed on their allies the condition of subjects.

The military command was delegated to the count of the Armenian frontier; the city of Theodosiopolis was built and fortified in a strong situation, on a fertile and lofty ground, near the sources of the Euphrates; and the dependent territories were ruled by five satraps, whose dignity was marked by a peculiar habit of gold and purple.

The less fortunate nobles, who lamented the loss of their king, and envied the honors of their equals, were provoked to negotiate their peace and pardon at the Persian court; and returning, with their followers, to the palace of Artaxata, acknowledged Chosroes for their lawful sovereign.

About thirty years afterwards, Artasires, the nephew and successor of Chosroes, fell under the displeasure of the haughty and capricious nobles of Armenia; and they unanimously desired a Persian governor in the room of an unworthy king.