9.51
Lucullus being greedy of fame and needing money, because he was in straitened circumstances, invaded the territory of the Vaccaei, another Celtiberian tribe, neighbors of the Arevaci, against whom war had not been declared by the Senate, nor had they ever attacked the Romans, or offended Lucullus himself. Crossing the river Tagus he came to the city of Cauca, and pitched his camp near it. The citizens asked him what he had come for and what occasion there was for war, and when he replied that he had come to aid the Carpetani whom the Vaccaei had maltreated they retired inside their walls, from which they sallied out and fell upon his wood-cutters and foragers, killing many and pursuing the remainder to the camp. When battle was joined the Caucaei, who resembled light-armed troops, had the advantage at first, but when they had expended all their darts they were obliged to fly, not being accustomed to a standing fight, and while forcing their way through the gates about 3000 of them were slain.