The duke, therefore, having acquired the Romagna and beaten the Colonnesi, while wishing to hold that and to advance further, was hindered by two things: the one, his forces did not appear loyal to him, the other, the goodwill of France: that is to say, he feared that the forces of the Orsini, which he was using, would not stand to him, that not only might they hinder him from winning more, but might themselves seize what he had won, and that the king might also do the same.

Of the Orsini he had a warning when, after taking Faenza and attacking Bologna, he saw them go very unwillingly to that attack.

And as to the king, he learned his mind when he himself, after taking the Duchy of Urbino, attacked Tuscany, and the king made him desist from that undertaking; hence the duke decided to depend no more upon the arms and the luck of others.
For the first thing he weakened the Orsini and Colonnesi parties in Rome, by gaining to himself all their adherents who were gentlemen, making them his gentlemen, giving them good pay, and, according to their rank, honouring them with office and command in such a way that in a few months all attachment to the factions was destroyed and turned entirely to the duke.

After this he awaited an opportunity to crush the Orsini, having scattered the adherents of the Colonna house.

This came to him soon and he used it well; for the Orsini, perceiving at length that the aggrandizement of the duke and the Church was ruin to them, called a meeting of the Magione in Perugia.