 He drove the French from Milan, prevented an attempt by the Italian princes, with French aid, to reassert their independence in the League of Cognac.His mutinous troops sacked Rome and, coming to terms with the Medici pope Clement VII, reinstalled the Medici as Dukes of Florence after a siege.Upon the extinction of the Sforza line in Milan, Charles V claimed the territory as an imperial fief and eventually installed his son Philip as the new Duke.