Res Gestae

So, at the emperor’s request, they came with their native arrogance to their bank of the river, not, as the event proved, intending to do what they were bidden, but in order not to appear to have feared the presence of the soldiers; and there they stood defiantly, thus giving the impression that they had come there to reject any orders that might be given.

But the emperor, suspecting that this might happen, had secretly divided his army into several bands, and with swift speed enclosed them, while they were delaying, within the lines of his own soldiers; then standing with a few followers on a loftier mound, protected by the defence of his guards, in mild terms he admonished them not to be unruly.

But they, wavering in uncertainty of mind, were distracted different ways, and with mingled craft and fury they thought both of entreaties and of battle; and preparing to sally out on our men where we lay near to them, they purposely threw forward their shields a long way, so that by advancing step by step to recover them they might without any show of treachery gain ground by stealth.