[351-352 A.D.]

The intelligence of these important events, which so deeply affected the honour and safety of the imperial house, recalled the arms of Constantius from the inglorious prosecution of the Persian War. He recommended the care of the East to his lieutenants, and afterwards to his cousin Gallus, whom he raised from a prison to a throne; and marched towards Europe, with a mind agitated by the conflict of hope and fear, of grief and indignation.

The city of Mursa, or Essek, celebrated in modern times for a bridge of boats five miles in length over the river Drave and the adjacent morasses, has been always considered as a place of importance in the wars of Hungary. 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 greater 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 valour and military skill which they exerted. They wisely began the action upon the left; and, advancing their whole wing of cavalry in an oblique line, they suddenly wheeled it on the right flank of the enemy, which was unprepared to resist the impetuosity of their charge. But the Romans of the West soon rallied by the habits of discipline, and the barbarians of Germany supported the renown of their national bravery. The engagement soon became general, was maintained with various and singular turns of fortune, and scarcely ended with the darkness of the night. The signal victory which Constantius obtained is attributed to the arms of his cavalry.

His cuirassiers are described as so many massy statues of steel, glittering with their scaly armour, and breaking with their ponderous lances the firm array of the Gallic legions. As soon as the legions gave way, the lighter and more active squadrons of the second line rode sword in hand into the intervals, and completed the disorder. In the meanwhile the huge bodies of the Germans were exposed, almost naked, to the dexterity of the oriental archers; and whole troops of those barbarians were urged by anguish and despair to precipitate themselves into the broad and rapid stream of the Drave. The number of the slain was computed at fifty-four thousand men and the slaughter of the conquerors was more considerable than that of the vanquished, a circumstance which proves the obstinacy of the contest, and justifies the observation of an ancient writer, that the forces of the empire were consumed in the fatal battle of Mursa by the loss of a veteran army sufficient to defend the frontiers or to add new triumphs to the glory of Rome. Notwithstanding the invectives of a servile orator, there is not the least reason to believe that the tyrant deserted his own standard in the beginning of the engagement. He seems to have displayed the virtues of a general and of a soldier till the day was irrecoverably lost and his camp in the possession of the enemy. Magnentius then consulted his safety, and, throwing away the imperial ornaments, escaped with some difficulty from the pursuit of the light horse, who incessantly followed his rapid flight from the banks of the Drave to the foot of the Julian Alps.

The detachments, however, which were ordered either to press or to intercept the flight of Magnentius, conducted themselves with the usual imprudence of success; and allowed him, in the plains of Ticinium, an opportunity of turning on his pursuers, and of gratifying his despair, by the carnage of a useless victory.

The pride of Magnentius was reduced by repeated misfortunes to sue, and to sue in vain, for peace. He first despatched a senator, in whose abilities he confided, and afterwards several bishops, whose holy character might obtain a more favourable audience, with the offer of resigning the purple, and the promise of devoting the remainder of his life to the service of the emperor. But Constantius, though he granted fair terms of pardon and reconciliation to all who abandoned the standard of rebellion, avowed his inflexible resolution to inflict a just punishment on the crimes of an assassin, whom he prepared to overwhelm on every side by the effort of his victorious arms. An imperial fleet acquired the easy possession of Africa and Spain, confirmed the wavering faith of the Moorish nations, and landed a considerable force, which passed the Pyrenees, and advanced towards Lyons, the last and fatal station of Magnentius. The temper of the tyrant, which was never inclined to clemency, was urged by distress to exercise every act of oppression which could extort an immediate supply from the cities of Gaul. Their patience was at length exhausted; and Trèves, the seat of prætorian government, gave the signal of revolt, by shutting her gates against Decentius, who had been raised by his brother to the rank either of cæsar or of augustus. From Trèves, Decentius was obliged to retire to Sens, where he was soon surrounded by an army of Germans, whom the pernicious arts of Constantius had introduced into the civil dissensions of Rome. In the meantime, the imperial troops forced the passages of the Cottian Alps, and in the bloody combat of Mount Seleucus, irrevocably fixed the title of rebels on the party of Magnentius.

He was unable to bring another army in the field, the fidelity of his guards was corrupted, and when he appeared in public to animate them by his exhortations, he was saluted with the unanimous shout of “Long live the emperor Constantius!” The tyrant, who perceived that they were preparing to deserve pardon and rewards by the sacrifice of the most obnoxious criminal, prevented their design by falling on his sword—a death more easy and more honourable than he could hope to obtain from the hands of an enemy, whose revenge would have been coloured with the specious pretence of justice and fraternal piety. The example of suicide was imitated by Decentius, who strangled himself on the news of his brother’s death. The author of the conspiracy, Marcellinus, had long since disappeared in the battle of Mursa, and the public tranquillity was confirmed by the execution of the surviving leaders of a guilty and unsuccessful faction.

A severe inquisition was extended over all who, either from choice or from compulsion, had been involved in the cause of rebellion. Paul, surnamed Catena, from his superior skill in the judicial exercise of tyranny, was sent to explore the latent remains of the conspiracy in the remote province of Britain. The honest indignation expressed by Martin, vice-prefect of the island, was interpreted as an evidence of his own guilt; and the governor was urged to the necessity of turning against his breast the sword with which he had been provoked to wound the imperial minister. The most innocent subjects of the West were exposed to exile and confiscation, to death and torture; and, as the timid are always cruel, the mind of Constantius was inaccessible to mercy.

CONSTANTIUS SOLE EMPEROR

[337-353 A.D.]