Ludovico Sforza’s position was a terrible one:  he was now suffering from his imprudence in calling the French into Italy; all the allies he had thought he might count upon were abandoning him at the same moment, either because they were busy about their own affairs, or because they were afraid of the powerful enemy that the Duke of Milan had made for himself.  Maximilian, who had promised him a contribution of 400 lances, to make up for not renewing the hostilities with Louis XII that had been interrupted, had just made a league with the circle of Swabia to war against the Swiss, whom he had declared rebels against the Empire.  The Florentines, who had engaged to furnish him with 300 men-at-arms and 2000 infantry, if he would help them to retake Pisa, had just retracted their promise because of Louis XII’s threats, and had undertaken to remain neutral.  Frederic, who was holding back his troops for the defence of his own States, because he supposed, not without reason, that, Milan once conquered, he would again have to defend Naples, sent him no help, no men, no money, in spite of his promises.  Ludovico Sforza was therefore reduced to his own proper forces.

But as he was a man powerful in arms and clever in artifice, he did not allow himself to succumb at the first blow, and in all haste fortified Annona, Novarro, and Alessandria, sent off Cajazzo with troops to that part of the Milanese territory which borders on the states of Venice, and collected on the Po as many troops as he could.  But these precautions availed him nothing against the impetuous onslaught of the French, who in a few days had taken Annona, Arezzo, Novarro, Voghiera, Castelnuovo, Ponte Corona, Tartone, and Alessandria, while Trivulce was on the march to Milan.

Seeing the rapidity of this conquest and their numerous victories, Ludovico Sforza, despairing of holding out in his capital, resolved to retire to Germany, with his children, his brother, Cardinal Ascanio Sforza, and his treasure, which had been reduced in the course of eight years from 1,500,000 to 200,000 ducats.  But before he went he left Bernardino da Carte in charge of the castle of Milan.  In vain did his friends warn him to distrust this man, in vain did his brother Ascanio offer to hold the fortress himself, and offer to hold it to the very last; Ludovico refused to make any change in his arrangements, and started on the 2nd of September, leaving in the citadel three thousand foot and enough provisions, ammunition, and money to sustain a siege of several months.

Two days after Ludovico’s departure, the French entered Milan.  Ten days later Bernardino da Come gave up the castle before a single gun had been fired.  Twenty-one days had sufficed for the French to get possession of the various towns, the capital, and all the territories of their enemy.