At this time Roberto da San Severino, with Lodovico and Ascanio (Sforza their elder brother being dead) again attacked Milan, in order to recover the government.  Having taken Tortona, and the city and the whole state being in arms, the duchess Bona was advised to restore the Sforzeschi, and to put a stop to civil contentions by admitting them to the government.  The person who gave this advice was Antonio Tassino, of Ferrara, a man of low origin, who, coming to Milan, fell into the hands of the duke Galeazzo, and was given by him to his duchess for her valet.  He, either from his personal attractions, or some secret influence, after the duke’s death attained such influence over the duchess, that he governed the state almost at his will.  This greatly displeased the minister Cecco, whom prudence and long experience had rendered invaluable; and who, to the utmost of his power, endeavored to diminish the authority of Tassino with the duchess and other members of the government.  The latter, aware of this, to avenge himself for the injury, and secure defenders against Cecco, advised the duchess to recall the Sforzeschi, which she did, without communicating her design to the minister, who, when it was done, said to her, “You have taken a step which will deprive me of my life, and you of the government.”  This shortly afterward took place; for Cecco was put to death by Lodovico, and Tassino, being expelled from the dukedom, the duchess was so enraged that she left Milan, and gave up the care of her son to Lodovico, who, becoming sole governor of the dukedom, caused, as will be hereafter seen, the ruin of Italy.

Lorenzo de’ Medici had set out for Naples, and the truce between the parties was in force, when, quite unexpectedly, Lodovico Fregoso, being in correspondence with some persons of Serezana, entered the place by stealth, took possession of it with an armed force, and imprisoned the Florentine governor.  This greatly offended the Signory, for they thought the whole had been concerted with the connivance of King Ferrando.  They complained to the duke of Calabria, who was with the army at Sienna, of a breach of the truce; and he endeavored to prove, by letters and embassies, that it had occurred without either his own or his father’s knowledge.  The Florentines, however, found themselves in a very awkward predicament, being destitute of money, the head of the republic in the power of the king, themselves engaged in a long-standing war with the latter and the pope, in a new one with the Genoese, and entirely without friends; for they had no confidence in the Venetians, and on account of its changeable and unsettled state they were rather apprehensive of Milan.  They had thus only one hope, and that depended upon Lorenzo’s success with the king.