The Battle of St. Jakob an der Birs was a significant military confrontation that unfolded in the summer of 1444 near Basel, Switzerland. On one side, the Swiss Confederates were composed of a small yet fiercely determined force of approximately 1,500 soldiers. They were up against the Dauphin Louis and his large Armagnac force, drawn from various regions of France, which boasted an overwhelming strength of about 20,000 troops. The conflict arose amidst a complex backdrop of political tensions in Europe, particularly revolving around the Hundred Years' War and the ambitions of the French crown.

The combat was characterized by the remarkable tenacity displayed by the Swiss forces, who, despite their numerical disadvantage, fought bravely to defend their territory and autonomy. The Swiss were known for their innovative battlefield tactics and use of pike formations, which had previously provided them great success in various engagements. The initial phases of the battle saw some effective resistance from the Swiss, but as the day progressed, they could not withstand the continuous pressure from the well-coordinated French forces. The decisive moments came when the overwhelming numbers of the Dauphin Louis’ troops encircled the Swiss, leading to a rout that would define this confrontation.

In the aftermath, the battle had lasting implications for both parties involved. While it was a tactical victory for Louis, it also highlighted the resilience of the Swiss Confederates and their commitment to independence. The battle's outcome contributed to shifting political dynamics in the region and allowed Louis to gain further influence in his quest for power.