C. Julius Caesar, Gallic War

Under these circumstances, our men being dismayed by the novelty of this mode of battle, Caesar most seasonably brought assistance; for upon his arrival the enemy paused, and our men recovered from their fear; upon which thinking the time unfavorable for provoking the enemy and coming to an action, he kept himself in his own quarter, and, a short time having intervened, drew back the legions into the camp. While these things are going on, and all our men engaged, the rest of the Britons, who were in the fields, departed. Storms then set in for several successive days, which both confined our men to the camp and hindered the enemy from attacking us. In the mean time the barbarians dispatched messengers to all parts, and reported to their people the small number of our soldiers, and how good an opportunity was given for obtaining spoil and for liberating themselves forever, if they should only drive the Romans from their camp. Having by these means speedily got together a large force of infantry and of cavalry they came up to the camp.