War of Ferrara
The War of Ferrara (also known as the Salt War, Italian: "Guerra del Sale") was fought in 1482–1484 between Ercole I d'Este, duke of Ferrara, and the Papal forces mustered by Ercole's personal nemesis, Pope Sixtus IV and his Venetian allies. Hostilities ended with the Treaty of Bagnolo, signed on 7 August 1484.