de bello gallico, 5.34

But a plan was not lacking for the barbarians. For their leaders ordered (them) to announce in the whole battle line that noone was to leave from their position, theirs was the booty and for them was reserved whatever the Romans had left behind: so then they thought that everything was placed in victory. They were equal for the fighting both in virtue and in number even. Our men, although they were deserted by their leader and by fortune, nevertheless they placed all hope of safety in virtue, and as many times as each cohort charged, on that side a great number of the enemy died. With which matter having been noticed, Ambiorix ordered that it be announced that they should throw their weapons from afar and not approach more closely and yield in which part the Romans made an attack: by the lightness of their weapons and by daily training nothing could be harmful to them: they should again follow them retreating to the standards.