Narses had to acknowledge, in so many words, that the Tigris, and not the Euphrates, was to be regarded as her true boundary, and that nothing consequently was to be considered as Persian beyond the more eastern of the two rivers.

Even this concession was not the last or the worst.

Narses had finally to submit to see his empire dismembered, a portion of Media attached to Armenia, and five provinces, never hitherto in dispute, torn from Persia and added to the dominion of Rome.

He had to allow Rome to establish herself in force on the left bank of the Tigris, and so to lay open to her assaults a great portion of his northern besides all his western frontier.

He had to see her brought to the very edge of the Iranic plateau, and within a fortnight's march of Persia Proper.