Res Gestae

Also, when Constantine was at Thessalonica, the Goths broke through the neglected frontiers, devasted Thrace and Moesia, and began to drive off booty. Then because of fear of Constantine and his check of their attack they returned their prisoners to him and peace was granted them. But Licinius complained of this action as a breach of faith, on the ground that his function had been usurped by another.

Finally, by using sometimes humble entreaties and sometimes arrogant threats, he aroused the deserved wrath of Constantine, During the interval before the civil war began, but while it was in preparation, Licinius

Now peace was broken by consent of both sides; Constantine sent Crispus Caesar with a large fleet to take possession of Asia, and on the side of Licinius, Amandus opposed him, likewise with naval forces.

Licinius himself had covered the slopes of a high mountain near Hadrianopolis with a huge army. Hither Constantine turned his march with his entire force. While the war went on slowly by land and sea, although Constantine’s army had great difficulty in scaling the heights, at last his good fortune and the discipline of his army prevailed, and he defeated the confused and disorganised army of Licinius;[*](324 A.D.) but Constantine was slightly wounded in the thigh.

Then Licinius fled to Byzantium; and while his scattered forces were on the way to the city, Licinius closed it, and feeling secure against an attack by sea, planned to meet a siege from the land-side. But Constantine got together a fleet from Thrace. Then Licinius, with his usual lack of consideration,[*](I.e., without consulting Constantine; cf. § 9, above.) chose Martinianus as his Caesar.

But Crispus, with Constantine’s fleet, sailed to Callipolis,[*](Modern Gallipoli, on the Hellespont.) where in a sea-fight he so utterly defeated Amandus that the latter barely made his escape with the help of the forces which he had left on shore. But Licinius’ fleet was in part destroyed and in part captured.