The Battle of Sempach took place on July 9, 1386, near the town of Sempach in present-day Switzerland. It was a significant conflict between the forces of the Old Swiss Confederacy and the troops of the Habsburg dynasty, led by Duke Leopold III. The battle was part of the struggle for independence and control over the region. The Swiss forces, numbering around 1,500, employed effective tactics and fought fiercely against a larger Habsburg army of approximately 6,000. The Swiss victory at Sempach solidified their reputation as skilled fighters and contributed to the growing autonomy of the Swiss Confederacy from external powers.