The Battle of Marignano was the last major engagement of the War of the League of Cambrai and took place on 13–14 September 1515, near the town now called Melegnano, 16 km southeast of Milan. It pitted the French army, composed of the best heavy cavalry and artillery in Europe, led by Francis I, newly crowned King of France, against the Old Swiss Confederacy, whose mercenaries until that point were regarded as the best medieval infantry force in Europe. With the French were German landsknechts, bitter rivals of the Swiss for fame and renown in war, and their late arriving Venetian allies. Background The campaign of Marignano followed years of Swiss successes, during which French fortunes in Northern Italy had suffered greatly. The Swiss had taken control of Milan (for France the gateway to Italy) after their victory at the Battle of Novara (1513), and returned to its ducal throne Massimiliano, son of Ludovico Sforza, to make Milan a protectorate of Switzerland. The prologue to the battle was an Alpine passage, in which Francis hauled pieces of artillery (72 huge cannons) over new-made roads over the Col d'Argentière, a previously unknown route. At Villafranca the French, led by Jacques de la Palice, surprised and captured the Papal commander, Prospero Colonna, in a daring cavalry raid deep behind the allied lines (the Chevalier Bayard providing the impetus and expertise). Colonna and his staff aside, the French seized a great deal of booty on the raid, including 600 horses. The capture of Colonna, along with the startling appearance of the French army on the plains of Piedmont, stunned the allies. The Pope and the Swiss both sought terms with Francis, while the Spanish allies en route from Naples halted to await developments. The main Swiss army retreated to Milan, while a large faction, tired of the war and eager to return home with the booty of years of successful campaigning, urged terms with the French. Though the parties reached a peace agreement that gave Milan back to the French, leading large portions of the Swiss army to return home, fresh troops also arrived from the Swiss cantons who refused to abide by the treaty. Discord swept through the Swiss forces until Matthäus Schiner, cardinal of Sion and an arch-enemy of King Francis, tricked the Swiss into doing battle with a far superior force by exaggerating the extent of a minor skirmish. The