The Battle of Nördlingen took place on August 3, 1645, during the Thirty Years' War. This conflict was fought between the forces of the Swedish Empire and the Holy Roman Empire, which included troops from various German states. The battle was significant as it marked a turning point in the war, showcasing the military prowess of the Imperial forces. The Imperial army, led by Field Marshal Johann von Werth and Count von Mercy, achieved a decisive victory against the Swedes, commanded by King Charles X Gustav. This defeat weakened Swedish influence in Germany and shifted the balance of power, ultimately contributing to the war's conclusion with the Peace of Westphalia in 1648.