The Roman throne was then occupied by Severus Alexander, a ruler in whom nothing was warlike but the name, and for whom in reality his mother Mamaea conducted the government. Urgent, almost humble proposals of peace on the part of the Roman government remained without effect; nothing was left but the employment of arms. The masses of the Roman army gathered together from all the empire were divided; the left wing took the direction of Armenia and Media, the right that of Mesene at the mouth of the Euphrates and Tigris, perhaps in the calculation that they might in the former as in the latter quarter have the support of the adherents of the Arsacids; the main army went to Mesopotamia. The troops were numerous enough, but without discipline and tone; a Roman officer of high position at this time himself testifies that they were pampered and insubordinate, refused to fight, killed their officers, and deserted in crowds. The main force did not get beyond the Euphrates,[79] for his mother represented to the emperor that it was not his business to fight for his subjects, but theirs to fight for him. The right wing, assailed in the level country by the Persian main force and abandoned by the emperor, was cut up. Thereupon, when the emperor issued orders to the wing which had pushed forward towards Media to draw back, the latter also suffered severely in the winter retreat through Armenia. If the matter went no further than this sorry return of the great Oriental army to Antioch, if no complete disaster occurred, and even Mesopotamia remained in Roman power, this appears due, not to the merit of the Roman troops or their leaders but to the fact that the Persian levy was weary of the conflict and went home.[80] But they went not for long, the more especially as soon after, upon the murder of the last offshoot of the dynasty of Severus, the several army-commanders and the government in Rome began to fight about the occupation of the Roman throne, and consequently were at one in their concern for the affairs of external foes. Under Maximinus (235-238) the Roman Mesopotamia fell into the power of Ardashir, and the Persians once more prepared to cross the Euphrates.[81] [Sidenote: The Persian war of Gordian.]