Res Gestae

And while we were hard pressed on every side by weight of armed men, siege-works, and monsters, round stones hurled at intervals from the battlements by the iron arms of our scorpions shattered

For even the king of the Persians himself, who is never compelled to take part in battles, aroused by these storms of ill-fortune, rushed into the thick of the fight like a common soldier (a new thing, never before heard of) and because he was more conspicuous even to those who looked on from a distance because of the throng of his body-guard, he was the mark of many a missile; and when many of his attendants had been slain he withdrew, interchanging the tasks of his tractable forces, and at the end of the day, though terrified by the grim spectacle neither of the dead nor of the wounded he at last allowed a brief time to be given to rest.

But night put an end to the conflict; and having taken a nap during the brief period of rest,

For a long time the sanguinary battle remained undecided, and not a man anywhere through fear of death gave up his ardour for defence; and the contest had reached a point when the fate of both parties was governed by some unavoidable hap, when that mound of ours, the result of long toil, fell forward as if shattered by an earthquake. Thus the gulf which yawned between the wall and the heap built up outside was made a level plain, as if by a causeway or a bridge built across it, and opened to the enemy a passage blocked by no obstacles, while the greater part of the soldiers that were thrown down ceased fighting, being either crushed or worn out.