Cannae Massacre: Hannibal Destroys Roman Army

Rome sent the largest army it had ever assembled to crush Hannibal Barca, and by sundown that army had ceased to exist. The Battle of Cannae in 216 BC was the worst single-day military disaster in Roman history, a defeat so complete that it became the textbook example of a double envelopment studied by military commanders for the next two thousand years. An estimated 50,000 to 70,000 Roman soldiers were killed in roughly eight hours of fighting on a dusty plain in southeastern Italy. Hannibal had been rampaging through Italy for two years since crossing the Alps with his army and war elephants. Rome responded by raising a force of approximately 86,000 men under consuls Lucius Aemilius Paullus and Gaius Terentius Varro, outnumbering Hannibal's roughly 50,000 troops by a substantial margin. The Romans intended to overwhelm the Carthaginians through sheer mass, packing their infantry into an unusually deep formation to punch through Hannibal's center. Hannibal turned Rome's numerical advantage into a death trap. He placed his weakest troops at the center of his line and his strongest African infantry on the flanks. As the Roman mass pushed forward, the Carthaginian center deliberately gave ground, bowing inward. The Romans pressed harder, crowding so tightly together that soldiers in the middle could barely swing their weapons. Then Hannibal's flanks swung inward like closing doors while his cavalry, having routed the Roman horsemen, sealed the rear. The Roman army was completely surrounded. What followed was methodical slaughter. Packed so densely they could not fight effectively, Roman soldiers were cut down rank by rank. Among the dead were the consul Paullus, two former consuls, and nearly a third of the Roman Senate. Yet Rome refused to surrender, refused even to ransom its captured soldiers, and eventually ground Hannibal down through attrition. Cannae taught Rome that losing a battle, even catastrophically, did not mean losing a war.