Battle of St. Jakob an der Birs: A vastly outnumbered force of Swiss Confederates is defeated by the Dauphin Louis (future Louis XI of France) and his army of 'Armagnacs' near Basel.

The Battle of St. Jakob an der Birs was fought between the Old Swiss Confederacy and French mercenaries, on the banks of the river Birs. The battle took place on 26 August 1444 and was part of the Old Zürich War. The site of the battle was near Münchenstein, Switzerland, just over 1 km outside the city walls of Basel, today within Basel's St-Alban district.

Louis XI, called "Louis the Prudent", was King of France from 1461 to 1483. He succeeded his father, Charles VII. Louis entered into open rebellion against his father in a short-lived revolt known as the Praguerie in 1440. The king forgave his rebellious vassals, including Louis, to whom he entrusted the management of the Dauphiné, then a province in southeastern France. Louis's ceaseless intrigues, however, led his father to banish him from court. From the Dauphiné, Louis led his own political establishment and married Charlotte of Savoy, daughter of Louis, Duke of Savoy, against the will of his father. Charles VII sent an army to compel his son to his will, but Louis fled to Burgundy, where he was hosted by Philip the Good, the Duke of Burgundy, Charles's greatest enemy.

Basel, also known as Basle, is a city in northwestern Switzerland on the river Rhine. Basel is Switzerland's third-most-populous city, with 177,595 inhabitants within the city municipality limits.