Battle of Herdonia (210 BC) Flaccus and Gn. Fulvius Centumalus). Some state that there was just one battle in fact, but there is no general agreement on this issue. Following his incursion into southern Italy in 217 BC, Hannibal defeated the Roman forces in the battle of Cannae (216 BC). This victory brought him a host of new allies from Campania, Samnium, Apulia, Lucania, Bruttium and Magna Graecia, who revolted from Rome enticed by his narrative of Roman oppression. One of these allies was the city of Herdonia in northern Apulia. It was the site of a general engagement between Hannibal and the Romans already
Socii to raise a double-strength army of four legions and four "alae" e.g. at the Battle of Cannae in 216 BC, where each Consul commanded an army of about 40,000 men. Polybius states that the Romans and their allies could draw on a grand total of 770,000 men fit to bear arms (of which 70,000 met the property requirement for cavalry) in 225 BC, shortly before the start of the Second Punic War. The Romans reportedly asked their allies for an urgent register of all "men fit to bear arms" for a "tumultus Gallicus". Polybius' subtotals, however, are garbled, as he