Gonzalvo was getting ready to sally from Barletta and take the offensive against the French when he heard that a treaty signed at Lyons on the 5th of April, 1503, between the Kings of Spain and France, made a change in the position, reciprocally, of the two sovereigns, and must suspend the military operations of their generals within the kingdom of Naples.
"The French general declared his readiness to obey his king," says Guicciardini; "but the Spanish, whether it were that he felt sure of victory or that he had received private instructions on that point, said that he could not stop the war without express orders from his king." And sallying forthwith from Barletta, he gained, on the 28th of April, 1503, at Cerignola, a small town of Puglia, a signal victory over the French commanded by the Duke of Nemours, who, together with three thousand men of his army, was killed in action.

The very day after his success Gonzalvo heard that a Spanish corps, lately disembarked in Calabria, had also beaten, on the 21st of April, at Seminara, a French corps commanded by D'Aubigny.

The great captain was as eager to profit by victory as he had been patient in waiting for a chance of it.

He marched rapidly on Naples, and entered it on the 14th of May, almost without resistance; and the two forts defending the city, the Castel Nuovo and the Castel dell' Uovo surrendered, one on the 11th of June and the other on the 1st of July.

The capital of the kingdom having thus fallen into the hands of the Spaniards, Capua and Aversa followed its example.