Niccolò Machiavelli,
History of Florence and Of the Affairs Of Italy Book IV…
“ Agnolo approached Imola while the forces of the Florentines were at Modigliana, and an intense frost having rendered the ditches of the city passable, he crossed them during the night, captured the place, and sent Lodovico a prisoner to Milan. The Florentines finding Imola in the hands of the enemy, and the war publicly known, sent their forces to Furli and besieged it on all sides. That the duke's people might not relieve it, they hired Count Alberigo, who from Zagonara, his own domain, overran the country daily, up to the gates of Imola. ”
