Answer:
He attacked Carthage's possession in Spain - New Carthage, which led Hannibal to withdraw his troops from Italy and to send them to Carthage as he was afraid that Scipio will attack Carthage directly.
Explanation:
After the battle of Cannae it looked like Hannibal had Romans in his hands. But, he refused to attack Rome directly, which was used by Romans to produce counterattack.
Therefore, Scipio decided to attack New Carthage to make Hannibal turn his attention from Italy.
After this Scipio attacked Hannibal in Carthage and heavily defeated him in the battle of Zama.
