Res Gestae

Accordingly, he established his camp near the banks of the Danastius, conveniently at some distance from the stockade of the Greuthungi, and sent Munderichus, afterwards in charge of the frontier throughout Arabia, with Lagarimanus and some other men of high rank, to a distance of twenty miles in advance, to observe

But the result was far other than he expected. For the Huns, who are shrewd in arriving at conclusions, suspecting that there was some large force farther off, disregarded the troops which they had seen, and who had disposed themselves to rest, as if there was nothing to disturb them; then, when the moon broke into the darkness of night, they chose what seemed to be the best course, crossed the river by a ford, and fearing lest some informer should get ahead of them and frighten off the enemy who were at a distance, they made a swift attack on Athanaricus himself.