Res Gestae

But there befell a terrible disgrace, which deserves to be buried in utter silence. For about seven hundred horsemen, belonging to two squadrons who had recently been sent to the aid of Mesopotamia from Illyricum, a spiritless and cowardly lot, were keeping guard in those parts. And dreading a night attack, they withdrew to a distance from the public roads at evening, when all the paths ought to be better guarded.

This was observed by the Persians, and about twenty thousand of them, under the command of Tamsapor and Nohodares, passed by the horsemen unobserved, while these were overcome with wine and sleep, and hid themselves with arms behind some high mounds near Amida.

And presently, when we were on the point of going to Samosata (as has been said) and were on our way while it was still twilight, from a high point our eyes caught the gleam of shining arms, and an excited cry was raised that the enemy were upon