Scipio had not expected any; the assault was merely designed to draw away the garrison from the side next to the harbour, where, having been informed that part of the latter was left dry at ebb-tide, he meditated a second attack.

While the assault was raging on the landward side, Scipio sent a division with ladders over the shallow bank "where Neptune himself showed them the way," and they had actually the good fortune to find the walls at that point undefended.
Thus the city was won on the first day; whereupon Mago in the citadel capitulated.

With the Carthaginian capital there fell into the hands of the Romans 18 dismantled vessels of war and 63 transports, the whole war-stores, considerable supplies of corn, the war-chest of 600 talents (more than; 40,000 pounds), ten thousand captives, among whom were eighteen Carthaginian gerusiasts or judges, and the hostages of all the Spanish allies of Carthage.

Scipio promised the hostages permission to return home so soon as their respective communities should have entered into alliance with Rome, and employed the resources which the city afforded to reinforce and improve the condition of his army.

He ordered the artisans of New Carthage, 2000 in number, to work for the Roman army, promising to them liberty at the close of the war, and he selected the able-bodied men among the remaining multitude to serve as rowers in the fleet.