Cannae, Italy, August 216 BC. In a classic example of double-envelopment maneuver, Hannibal inflicts the greatest ever defeat on the forces of Rome. A mighty Roman army, eight legions strong, marches out to crush the Carthaginian general on an open battlefield. Though Hannibal has far fewer men at his disposal, and none of his famous elephants, he manages to surround and slaughter the superior Roman force. See why Hannibal's military genius is still being lauded and taught in academies today. Hosted by Matthew Settle (Band of Brothers).