C. Julius Caesar, Gallic War

The foraging having in the mean time been completed, our soldiers distinctly hear the shout; the horse hasten on before and discover in what danger the affair is. But here there is no fortification to receive them, in their alarm: those last enlisted, and unskilled in military discipline turn their faces to the military tribune and the centurions; they wait to find what orders may be given by them. No one is so courageous as not to be disconcerted by the suddenness of the affair. The barbarians, espying our standard in the distance, desist from the attack; at first they suppose that the legions, which they had learned from their prisoners had removed further off, had returned; afterward, despising their small number, they make an attack on them at all sides.