Sulla (17.7-18.1)

After Gabinius had borne testimony to the men’s courage and fidelity, Sulla ordered them to make the attempt, while he himself proceeded to form his line of battle, and to dispose his cavalry on either wing, taking command of the right himself, and assigning the left to Murena.[*] His lieutenants, Galba and Hortensius, with cohorts of reserves, stationed themselves on the heights in the rear, to guard against attacks on the flanks. For the enemy were observed to be making their wing flexible and light for evolution with large bodies of horse and light infantry, purposing to extend it and envelop the Romans.

Meanwhile the Chaeroneians, over whom Ericius had been placed in command by Sulla, made their way unnoticed around Thurium and then showed themselves suddenly, producing great confusion and rout among the Barbarians, and slaughter at one another’s hands for the most part. For they did not hold their ground, but rushed down the steeps, falling upon their own spears and crowding one another down the precipices, while their enemies pressed upon them from above and smote their exposed bodies, so that three thousand of them fell on Thurium.