Magnentius, directing his march towards Mursa, set fire to the gates, and, by a sudden assault, had almost scaled the walls of the town.

The vigilance of the garrison extinguished the flames; the approach of Constantius left him no time to continue the operations of the siege; and the emperor soon removed the only obstacle that could embarrass his motions, by forcing a body of troops which had taken post in an adjoining amphitheatre.

The field of battle round Mursa was a naked and level plain: on this ground the army of Constantius formed, with the Drave on their right; while their left, either from the nature of their disposition, or from the superiority of their cavalry, extended far beyond the right flank of Magnentius.

The troops on both sides remained under arms, in anxious expectation, during the greatest part of the morning; and the son of Constantine, after animating his soldiers by an eloquent speech, retired into a church at some distance from the field of battle, and committed to his generals the conduct of this decisive day.

They deserved his confidence by the valor and military skill which they exerted.