The Profession of Arms () is a 2001 Italian film directed by Ermanno Olmi.
In autumn 1526, during the War of the League of Cognac, Emperor Charles V sends veteran general Georg von Frundsberg with an army of German Landsknechte to march towards Rome. The outnumbered papal armies, commanded by Giovanni de' Medici, try to chase them in the midst of a harsh winter, relying on hit-and-run raids on the Imperial supply trains in order to delay their march.
Federico II Gonzaga, the Marquis of Mantua, intent on avoiding war in his domain, allows the Imperial armies to pass through his fortifications at Curtatone, denying passage a few hours later to the papal troops. The Imperial army reaches Ferrara, where Alfonso I d'Este provides Frundsberg with four falconets capable of piercing any type of armor, in exchange for the marriage of his heir to an Imperial princess.
The exhausted papal army manages to reach an Imperial detachment at Governolo, where de' Medici intends to capture Frundsberg. In the ensuing skirmish, de' Medici is wounded in the leg by a falconet shot and transported to Mantua. The attempts to cure his infected wound fail and he dies of sepsis. The Imperial armies assault Rome.
The film ends straightforwardly with the declaration made after the death of Giovanni de' Medici by the commanders of the armies in Europe of ceasing to use firearms because of their cruelty.