Before the decisive battle, Constantine had tried to win over the enthusiasm of the Christians in his own and his adversaries’ army to his cause, and therefore the sign of the cross was made the principal ensign of the Roman army. The report was spread that a shining cross with this inscription, “By this sign thou shalt conquer,” had appeared to him in the sky, and that in the following night, Christ himself had commanded him in a dream to make the sign of the cross his standard against the enemy. On the day before the battle, the cross and the monogram of the redeemer appeared on the imperial standard, which from thenceforth bore the name of Labarum; and afterwards Constantine publicly announced that he had seen the cross in the sky, and had conquered his enemy by the direct aid of God.
After his victory over Maxentius the character of Constantine changed, and his subsequent proceedings often stand in opposition to the principles which he publicly acknowledged. He went over to Christianity, although in prudent fashion, not formally nor irrevocably, and for this the Christian priests permitted and forgave him everything. The miserable senate, which for a long time had ceased to be a governmental institution and to be consulted in affairs of state, declared him the first of the three emperors of the realm, and in this manner he passed naturally to the idea of undivided sway. Although he made the cross the imperial standard, he took part in the heathen sacrifices, allowed himself to consult soothsayers, and bore the title of a high priest of the old religion as before. Moreover he postponed the rite of baptism until his death-bed, that he might pass, according to the teaching of the priests at his court, into the next life washed clean from all sin.
From Rome Constantine went to Milan,[54] where he met Licinius and gave him his sister Constantia in marriage. Then he went to his province of Gaul, to repulse the German tribes which had again invaded the country; but Licinius hastened to meet the emperor Maximin, who was trying to wrest from him his share of the empire, and had already seized the towns of Byzantium and Heraclea, or Perinthus.
To the south of Hadrianopolis there was a decisive battle between the two emperors. Licinius won it, and tradition has also attributed his victory to a divine miracle, although the victor was in no way inclined towards Christianity. It is said that an angel appeared to Licinius and taught him a prayer, which on his awakening he immediately caused to be written out and distributed to the soldiers. This prayer was sung before the beginning of the battle and helped them to victory (313). Maximin fled; on the way he took poison, which brought on a severe illness of which he died after great tortures. With terrible harshness and cruelty Licinius proceeded against the relations and friends of Maximin. They were all put to death without mercy and the widow and daughter of Diocletian, as well as the sons of Galerius and Severus, perished as sacrifices to the wanton brutality of Licinius.
STRUGGLE BETWEEN CONSTANTINE AND LICINIUS
[314 A.D.]
The Roman world was now divided between Constantine and Licinius, the former of whom was master of the West, and the latter of the East. It might perhaps have been expected that the conquerors, fatigued with civil war and connected by a private as well as a public alliance, would have renounced, or at least would have suspended, any further designs of ambition; and yet a year had scarcely elapsed after the death of Maximin, before the victorious emperors turned their arms against each other. The genius, the success, and the aspiring temper of Constantine may seem to mark him out as the aggressor; but the perfidious character of Licinius justifies the most unfavourable suspicions, and by the faint light which history reflects on this transaction, we may discover a conspiracy fomented by his arts against the authority of his colleague.[55]