6.2
However, it would seem that even after peace was made the Gaesatae renewed the war; they crossed the Alps and stirred up the Insubrians. They numbered thirty thousand themselves, and the Insubrians, whom they joined, were much more numerous. With high confidence, therefore, they marched at once to Acerrae, a city situated to the north of the river Po.According to Polybius (ii. 34), no peace was made, although the Gauls offered to submit, and the consuls marched into the territory of the Insubrians and laid siege to Acerrae. From thence Britomartus the king, taking with him ten thousand of the Gaesatae, ravaged the country about the Po.
6.3
When Marcellus learned of this, he left his colleague at Acerrae with all the heavy-armed infantry and a third part of the cavalry, while he himself, taking with him the rest of the cavalry and the most lightly equipped men-at-arms to the number of six hundred, marched, without halting in his course day or night, until he came upon the ten thousand Gaesatae near the place called Clastidium, a Gallic village which not long before had become subject to the Romans.
