4.21
Scipio suffered severely. The 10,000 Carthaginians who were at the gates made sallies with drawn swords and fell upon those who were working the engines. Although they fought bravely, they suffered in their turn no less, until finally the perseverance and endurance of the Romans began to prevail. With the change of fortune, those who were on the walls began to be distressed. When the ladders were put in place, the Carthaginian swordsmen, who had sallied out, ran back through the gates, closed them, and mounted the walls. This gave new and severe labor to the Romans. Scipio, who, as commanding general, was everywhere, giving orders and cheering on his men, had noticed that, at the place where the wall was low and washed by the lagoon, the sea retired about midday. That was the daily ebb tide, for at one time of day the waves were up to one’s breast; at another they were not knee high. When Scipio observed this, after ascertaining the nature of the tidal movement and that it would be low water for the rest of the day, he darted hither and thither, exclaiming: Now, soldiers, now is our chance. Now the deity comes to my aid. Attack that part of the wall where the sea has made way for us. Bring the ladders. I will lead you.