Hannibal brought 80 war elephants to Zama -- North African forest elephants, now extinct, smaller than their modern African cousins but terrifying nonetheless. The beasts were supposed to shatter the Roman formation before the infantry engaged. Scipio had a plan. When the elephants charged, Roman trumpeters blasted their instruments, panicking some animals into turning back through the Carthaginian cavalry on both wings and disorganizing them. The remaining elephants charged forward, but Scipio had arranged his infantry maniples with gaps between them, creating corridors through which the elephants could pass harmlessly. The velites -- Roman skirmishers armed with javelins -- herded the beasts through these lanes, out the back of the formation, and into irrelevance. In a single opening gambit, Hannibal's most dramatic weapon was neutralized.

Both armies deployed their close-order infantry in three lines -- a mirroring that made the ensuing battle extraordinarily intense. The first Carthaginian line, composed of mercenaries and local levies, engaged the Roman hastati and was routed after hard fighting. But the second Carthaginian line, fanatically committed, then threw itself against the battered Romans, inflicting heavy casualties and pushing them backward. Scipio committed his second line of principes, and together they forced the Carthaginians to withdraw. There was a pause. Scipio used it to reorganize, extending his force into a single long line to match the depth of Hannibal's third and most formidable line: his Italian veterans, the soldiers who had fought with him for sixteen years. When these two lines charged each other, Polybius wrote, it was "with the greatest fire and fury." Neither side could gain the advantage.

The battle's decisive moment came from the wings. The Roman cavalry, strengthened by Masinissa's Numidian horsemen, had routed their Carthaginian counterparts at the battle's opening and pursued them off the field. Now they returned and struck Hannibal's veteran infantry from behind. Caught between the Roman infantry to their front and cavalry to their rear, the Carthaginian third line was surrounded and destroyed. The army that Hannibal had spent sixteen years forging -- the force that had terrorized the Italian peninsula and brought Rome to the brink of collapse -- ceased to exist on a Tunisian plain. Carthage had no reserves left. Hannibal himself survived, but he would soon be forced into exile.

The peace terms Rome dictated stripped Carthage of its territories outside Africa and reduced even its African holdings. More fundamentally, the settlement made clear that Carthage was now politically subordinate to Rome -- a reversal of the balance of power that had shaped the western Mediterranean for centuries. Scipio earned the cognomen "Africanus" for his victory. The exact site of the battle remains debated, but modern scholarship generally places it on flat ground south of ancient Sicca, near modern El Kef, at the Draa el Metnan. The approximate 30,000 Romans who fought at Zama were outnumbered by the 40,000 to 50,000 Carthaginians, but Scipio's tactical innovations -- the elephant corridors, the flexible infantry reorganization, the coordinated cavalry envelopment -- established a template for decisive battle that military theorists would study for millennia.