The pope having observed in the course of the war, how promptly and earnestly the Florentines adhered to their alliances, although he had previously been opposed to them from his attachment to the Genoese, and the assistance they had rendered to the king, now evinced a more amicable disposition, and received their ambassadors with greater favor than previously.  Lorenzo de’ Medici, being made acquainted with this change of feeling, encouraged it with the utmost solicitude; for he thought it would be of great advantage, if to the friendship of the king he could add that of the pontiff.  The pope had a son named Francesco, upon whom designing to bestow states and attach friends who might be useful to him after his own death, saw no safer connection in Italy than Lorenzo’s, and therefore induced the latter to give him one of his daughters in marriage.  Having formed this alliance, the pope desired the Genoese to concede Serezana to the Florentines, insisting that they had no right to detain what Agostino had sold, nor was Agostino justified in making over to the Bank of San Giorgio what was not his own.  However, his holiness did not succeed with them; for the Genoese, during these transactions at Rome, armed several vessels, and, unknown to the Florentines, landed three thousand foot, attacked Serezanello, situated above Serezana, plundered and burnt the town near it, and then, directing their artillery against the fortress, fired upon it with their utmost energy.  This assault was new and unexpected by the Florentines, who immediately assembled their forces under Virginio Orsino, at Pisa, and complained to the pope, that while he was endeavoring to establish peace, the Genoese had renewed their attack upon them.  They then sent Piero Corsini to Lucca, that by his presence he might keep the city faithful; and Pagolantonio Soderini to Venice, to learn how that republic was disposed.  They demanded assistance of the king and of Signor Lodovico, but obtained it from neither; for the king expressed apprehensions of the Turkish fleet, and Lodovico made excuses, but sent no aid.  Thus the Florentines in their own wars are almost always obliged to stand alone, and find no friends to assist them with the same readiness they practice toward others.  Nor did they, on this desertion of their allies (it being nothing new to them) give way to despondency; for having assembled a large army under Jacopo Guicciardini and Pietro Vettori, they sent it against the enemy, who had encamped upon the river Magra, at the same time pressing Serezanello with mines and every species of attack.  The commissaries being resolved to relieve the place, an engagement ensued, when the Genoese were routed, and Lodovico dal Fiesco, with several other principal men, made prisoners.  The Serezanesi were not so depressed at their defeat as to be willing to surrender, but obstinately prepared for their defense, while the Florentine commissaries proceeded with their operations, and instances