The painting shows an episode of the war against Pisa, occurred during the winter of 1498 when the Florentines forced the Venetian troops sent to help Pisa to retreat, having blocked them in Casentino by closing the passageways and moving against them with the help of the inhabitants of the area. In the foreground the Allegory of the Apennines, "filled with ice and snow". Photo: Simone Lampredi