Siege of Capua (211 BC) Siege of Capua (211 BC) The Siege of Capua was fought in 211 BC, when the Romans besieged Capua. It is described by Polybius at 9.4-7, and by Livy at 26.4-6. Capua had defected to Hannibal after the Battle of Cannae in 216 BC. Hannibal had made Capua his winter quarter in 215 BC and had conducted his campaigns against Nola and Casilinum from there. The Romans had attempted to march on Capua several times since its defection but were thwarted by the return of Hannibal's army rushing to its defence; the latest attempt had cost them some 16,000 men
Early Middle Ages had broken down, and the Roman army comprised mainly barbarians and soldiers recruited for a single campaign. The general decline in discipline also led to the use of smaller shields and lighter weaponry. Not wanting to share the glory, Eastern Emperor Valens ordered an attack on the Therving infantry under Fritigern without waiting for Western Emperor Gratian, who was on the way with reinforcements. While the Romans were fully engaged, the Greuthung cavalry arrived. Only one-third of the Roman army managed to escape. This represented the most shattering defeat that the Romans had suffered since the Battle of Cannae (216