The last-named, prone to the direct methods of murder by which he had rid Bologna of the Marescotti, is said to have declared that he would kill Cesare Borgia if he but had the opportunity, whilst Vitelli swore solemnly that within a year he would slay or capture the duke, or else drive him out of Italy.
From this it will be seen that the Diet of Magione was no mere defensive alliance, but actually an offensive one, with the annihilation of Cesare Borgia for its objective.
They certainly had the power to carry out their resolutions, for whilst Cesare disposed at that moment of not more than 2,500 foot, 300 men-at-arms, and the 100 lances of his Caesarean guard of patricians, the confederates had in arms some 9,000 foot and 1,000 horse.

Conscious of their superior strength, they determined to strike at once, before Cesare should be further supported by the French lances, and to make sure of him by assailing him on every side at once.

To this end it was resolved that Bentivogli should instantly march upon Imola, where Cesare lay, whilst the others should possess themselves of Urbino and Pesaro simultaneously.
They even approached Florence and Venice in the matter, inviting the Republics to come into the league against Valentinois.
The Florentines, however, could not trust such enemies of their own as Vitelli and the Orsini, nor dared they join in an enterprise which had for scope to make war upon an ally of France; and they sent word to Cesare of their resolve to enter into no schemes against him.
The Venetians would gladly have moved to crush a man who had snatched the Romagna from under their covetous eyes; but in view of the league with France they dared not.

What they dared, they did.

They wrote to Louis at length of the evils that were befalling Italy at the hands of the Duke of Valentinois, and of the dishonour to the French crown which lay for Louis in his alliance with Cesare Borgia.