Battle of Cannae 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
Titus Manlius Torquatus (consul 235 BC) to cross the Po river, then defeated the Boii there. The Celts lost 23,000 men and 5,000 of them were captured, but the consuls had to retreat because of poor weather and decease among their troops. In 216 BC, as one of the most senior senators then living, he successfully opposed the ransoming of the Romans taken prisoner at the Battle of Cannae, on the grounds that they had made no effort to break out of the Carthaginian lines. In 215 BC he was sent to Sardinia, after the illness of Quintus Mucius Scaevola and defeated a Carthaginian attempt under