Basil Boioannes detachment of the elite Varangian Guard was sent. The two forces met on the river Ofanto near Cannae, the site of Hannibal's victory over the Romans in 216 BC. In the second Battle of Cannae, Boioannes achieved an equally decisive victory. Boioannes protected his gains by immediately building a great fortress at the Apennine pass guarding the entrance to the Apulian plain. Troia, named after the ancient city of Asia Minor, was garrisoned by Boioannes' own contingent of Norman troops in 1019. Soon, all the Mezzogiorno had submitted to Byzantine authority, with the exception of the Duchy of Benevento, which
Potenza at present, some south of today's Potenza. The Lucani of Potentia sided against Rome's enemies during the latter's wars against the Samnites and the Bruttii. Subjugated during the 4th century BC (later gaining the status of "municipium"), the Potentini rebelled after the Roman defeat at Cannae in 216 BC. However, the Battle of the Metaurus marked the end of any Carthaginian aspirations in Italy and Potentia was reconquered by the Romans and reduced to the status of military colony. In the 6th century, the city passed to the Lombard Duchy of Benevento. Incursions by Saracens raiders menaced the city until