It was demonstrated that the arrangement had only been undertaken to provide the Christian princes with another weapon for attacking the Ottoman Empire, and before this consideration, one may readily suppose, all the pope's scruples vanished; on the 25th of June, therefore, it was decided to call a consistory which was to declare Frederic deposed from the throne of Naples.

When Frederic heard all at once that the French army had arrived at Rome, that his ally Ferdinand had deceived him, and that Alexander had pronounced the sentence of his downfall, he understood that all was lost; but he did not wish it to be said that he had abandoned his kingdom without even attempting to save it.

So he charged his two new condottieri, Fabrizio Calonna and Ranuzia di Marciano, to check the French before Capua with 300 men-at-arms, some light horse, and 3000 infantry; in person he occupied Aversa with another division of his army, while Prospero Colonna was sent to defend Naples with the rest, and make a stand against the Spaniards on the side of Calabria.
These dispositions were scarcely made when d'Aubigny, having passed the Volturno, approached to lay siege to Capua, and invested the town on both sides of the river.

Scarcely were the French encamped before the ramparts than they began to set up their batteries, which were soon in play, much to the terror of the besieged, who, poor creatures, were almost all strangers to the town, and had fled thither from every side, expecting to find protection beneath the walls.

So, although bravely repulsed by Fabrizio Colonna, the French, from the moment of their first assault, inspired so great and blind a terror that everyone began to talk of opening the gates, and it was only with great difficulty that Calonna made this multitude understand that at least they ought to reap some benefit from the check the besiegers had received and obtain good terms of capitulation.