The Caudini were a Samnite tribe that lived among the mountains ringing Campania and in the valleys of the Isclero and Volturnus rivers. Their capital was at Caudium, but it seems certain that the appellation was not confined to the citizens of Caudium and its immediate territory. Livy speaks in more than one passage of the Caudini as a tribe or people, in the same terms as of the Hirpini, and Niebuhr supposed them to have been one of the four tribes comprising the Samnite confederacy As the most western of the Samnite groups, they were the Samnite tribe most affected by the neighbouring Greeks of Campania.