de bello gallico, 4.33

This is the kind of fight from war chariots. First through all parts they ride around and throw darts and by the terror itself of the horses and the noise of the wheels they disturb the lines for the most part and, when they have insinuated themselves among the troups of cavalry, they jump down from their chariots and fight on foot. The drivers, meanwhile, little by little leave from battle and thus gather the chariots so that if those men are pressed by a multitude of the enemy they have an easy retreat to their men. They thus demonstrate the mobility of their cavalry and the stability of their foot soldiers in battle, and by daily use and exercise they bring about so greatly that they have become accustomed to hold the spurred-on horses in a sloping and headlong place and quickly rein in and turn and run quickly along the pole of the chariot and stop on the yoke and thence take themselves back most quickly into their chariots.