There are about 150 references to Cantabria or the Cantabri in surviving Greek and Latin texts. The Cantabri were used as mercenaries in various conflicts, both within the Iberian Peninsula and elsewhere. It is certain that they participated the Second Punic War, from references by Silius Italicus and Horace. When C. Hostilius Mancinus was besieging Numantia, he withdrew upon learning that Cantabri and Vaccaei were present among his auxiliaries. The Cantabrian Wars began in They were defeated by Agrippa with great slaughter in , but they revolted again under Tiberius and were never entirely subdued.