Battle of Cannae  The Battle of Cannae () was a key engagement of the Second Punic War between the Roman Republic and Carthage, fought on 2 August 216 BC near the ancient village of Cannae in Apulia, southeast Italy. The Carthaginian army, led by Hannibal, surrounded and practically annihilated a larger Roman army under the consuls Lucius Aemilius Paullus and Gaius Terentius Varro. It is regarded as one of the greatest tactical feats in military history and one of the worst defeats in Roman history. Having recovered from their losses at Trebia (218 BC) and Lake Trasimene (217 BC), the Romans decided to engage Hannibal at Cannae, with approximately 86,000 Roman and allied troops. They massed their heavy infantry in a deeper formation than usual, while Hannibal used the double envelopment tactic and surrounded his enemy, trapping the majority of the Roman army, who were then slaughtered. The loss of life on the Roman side was one of the most lethal single day's fighting in history; Adrian Goldsworthy equates the death toll at Cannae to "the massed slaughter of the British Army on the first day of the Somme offensive in 1916." Only about 15,000 Romans, most of whom were from the garrisons of the camps and had not taken part in the battle, escaped death. Following the defeat, Capua and several other Italian city-states defected from the Roman Republic to Carthage. As news of this defeat reached Rome, the city was gripped in panic. Authorities resorted to extraordinary measures, which included consulting the Sibylline Oracles and dispatching a delegation led by Quintus Fabius Pictor to consult the Delphic oracle in Greece. To raise two new legions, the authorities lowered the draft age and enlisted criminals, debtors and even slaves. Despite the extreme loss of men and equipment, and a second massive defeat later that same year at Silva Litana, the Romans refused to surrender to Hannibal. His offer to ransom survivors was brusquely refused. The Romans fought for 14 more years until they achieved victory at the Battle of Zama. Although for most of the following decades the battle was seen solely as a major Roman disaster, by modern times Cannae acquired a mythic quality and is often used as an example of the perfect defeat of an enemy army. Shortly after the start of the Second Punic War, Hannibal crossed into Italy by traversing the Pyrenees and the Alps during the summer and early autumn of 218 BC.