Caesar left a sufficient garrison behind him, and marched on to Faenza.
But there the face of things was changed: Faenza at that time was under the rule of Astor Manfredi, a brave and handsome young man of eighteen, who, relying on the love of his subjects towards his family, had resolved on defending himself to the uttermost, although he had been forsaken by the Bentivagli, his near relatives, and by his allies, the Venetian and Florentines, who had not dared to send him any aid because of the affection felt towards Caesar by the King of France.

Accordingly, when he perceived that the Duke of Valentinois was marching against him, he assembled in hot haste all those of his vassals who were capable of bearing arms, together with the few foreign soldiers who were willing to come into his pay, and collecting victual and ammunition, he took up his position with them inside the town.
By these defensive preparations Caesar was not greatly, disconcerted; he commanded a magnificent army, composed of the finest troops of France and Italy; led by such men as Paolo and Giulio Orsini, Vitellozzo Vitelli and Paolo Baglione, not to steak of himself--that is to say, by the first captains of the period.

So, after he had reconnoitred, he at once began the siege, pitching his camp between the two rivers, Amana and Marziano, placing his artillery on the side which faces on Forli, at which point the besieged party had erected a powerful bastion.
At the end of a few days busy with entrenchments, the breach became practicable, and the Duke of Valentinois ordered an assault, and gave the example to his soldiers by being the first to march against the enemy.

But in spite of his courage and that of his captains beside him, Astor Manfredi made so good a defence that the besiegers were repulsed with great loss of men, while one of their bravest leaders, Honario Savella; was left behind in the trenches.
But Faenza, in spite of the courage and devotion of her defenders, could not have held out long against so formidable an army, had not winter come to her aid.

Surprised by the rigour of the season, with no houses for protection and no trees for fuel, as the peasants had destroyed both beforehand, the Duke of Valentinois was forced to raise the siege and take up his winter quarters in the neighbouring towns, in order to be quite ready for a return next spring; for Caesar could not forgive the insult of being held in check by a little town which had enjoyed a long time of peace, was governed by a mere boy, and deprived of all outside aid, and had sworn to take his revenge.