BATTLE OF MILVIAN BRIDGE

The underlying cause of the battle was a five-year long dispute between Constantine and Maxentius over control of the western half of the empire. Although Constantine was the son of the western emperor Constantius Chlorus, the system in place at the time, the tetrarchy, did not necessarily provide for hereditary succession. When Constantius died on July 25, 306, his father's troops proclaimed him as Augustus (October 29, 306), but in Rome the favorite was Maxentius, the son of Constantinius' predecessor, Maximum. Both men continued to claim the title afterwards, although a conference to resolve the dispute in 308 resulted in Maxentius being named a senior emperor along with Galerius. Constantine was allowed to maintain rule of the provinces of Britain and Gaul, but was officially only a 'Caesar'�, or junior emperor. 

By 312, the two men were engaged in open hostility to one another, although they were brothers-in-law. Much of this was the work of Maxentius' father Maximiam, who had been forcibly retired as emperor in 305 by Diocletian. Maximiam schemed and double-crossed both his son and Constantine trying to regain power before the latter had his executed in 310. When Galetius died in 311, the power struggle was on. In the summer of 312, Constantine gathered his forces and decided to settle the dispute by force.

He easily overran northern Italy, and stood less than 10 miles from Rome when Maxentius chose to make his stand in front of the Milvian Bridge, a stone bridge (still standing today) which carries the Via Flaminia road across the Tiber River into Rome. Holding it was crucial if Maxentius was to keep his rival out of Rome, where the Senate would surely favor whoever held the city.

Constantine, after arriving, realized he had made a miscalculation and that Maxentius had many more soldiers available than he did. Some sources say the advantage was 10-to-1 in Maxentius' favor, but it was probably more like 4-to-1. In any case, Constantine had a tough challenge ahead of him.

On the evening of October 27, 312,with the armies preparing for battle Constantine reportedly had a vision as he looked toward the setting sun. The Greek letter 'Chi-Ro'� (Christ) intertwined along with a cross appeared emblazoned on the sun, along with the inscription, "By this sign you will conquer."� Constantine, who was a pagan at the time, put the symbol on his solders' shields. Constantine then chose fifty of the most pious knights of his personal imperial bodyguard, the Praepositi Laberorum, distinguished for personal strength, valor, and with first command of chivalric virtues, for the sole care and defense of the standard. There were thus no less than fifty men whose only duty was to surround and vigilantly defend the standard, which they carried each in turn on their shoulders.

The next day, the two armies clashed, and Constantine emerged victorious. Already known as a skillful general, Constantine began to push Maxentius' army back toward the Tiber, and Maxentius decided to retreat and make another stand at Rome itself. But there was only one escape route, via the bridge, and Constantine's men inflicted heavy losses on the retreating army. Finally, a bridge of boats set up alongside the Milvian Bridge, over which many of the troops were escaping, collapsed and these men stranded on the north bank of the Tiber were either taken prisoner or killed, with Maxentius numbered among the dead.

Constantine entered Rome not long afterwards and was acclaimed as sole western Augustus. He credited his victory at Milvian Bridge to the God of the Christians, the One True God, and ordered the end of any religious persecution within his realm, a step he had already taken in Britain and Gaul in 306. With the emperor as a patron, Christianity, which was already quite common in the empire, exploded in popularity.

(Reprinted with permission of the Holy Chivalric Order of St. Michael)

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