Zosimus, New History 2.21
Zosimus (Greek Ζώσιμος): Early Byzantine, pagan author of a history of the Roman Empire, published in the first quarter of the sixth century CE.
The translation of Zosimus' New History offered here was printed in 1814 by W. Green and T. Chaplin in London, and was probably prepared by J. Davis of the Military Chronicle and Military Classics Office. The translator is anonymous. The text was found at Tertullian.org. The notes were added by Jona Lendering.
[2.21.1] Constantine hearing that the Sauromatae, who dwelt near the Palus Maeotis, had passed the Ister in boats, and pillaged his territories, led his army against them, and was met by the barbarians, under their king Rausimodus. The Sauromatae attacked a town which was sufficiently garrisoned, but its wall was built in the lower part of stone, and in the upper part of wood.
[2.21.2] They therefore thought that they might easily take the town by burning all the wooden part of the wall; and with that view set it on fire, and in the meantime shot at those who stood on the walls. The defenders threw down darts and stones upon the barbarians, and killed many of them; and Constantine then coming up and falling on them from a higher ground, slew a great number, took wore alive, and put the rest to flight.
[2.21.3] Rausimodus, having lost the greater part of his army, took shipping and crossed the Ister, with an intention of once more plundering the Roman dominions. Constantine, hearing of his design, followed them over the Ister, and attacked them in a thick wood upon a hill, to which they had fled, where he killed many of them, amongst whom was Rausimodus. He also took many of them prisoners, giving quarter to those that would submit; and returned to his head-quarters with an immense number of captives.