The Battle of Legnano took place on May 29, 1176, between the forces of the Holy Roman Empire and the Lombard League, a coalition of northern Italian city-states. The battle was significant as it marked a turning point in the struggle for autonomy against imperial authority. The Lombard League, led by the city of Milan, successfully defeated the imperial army, which was commanded by Frederick I Barbarossa. This victory bolstered the power of the Lombard League and encouraged other cities to join their cause. The battle is often seen as a symbol of the fight for independence and self-governance in Italy. It ultimately led to the signing of the Peace of Constance in 1183, which recognized the rights of the Lombard cities.