The famous battle that took place on June 18, 1815, was the Battle of Waterloo. This confrontation marked the definitive defeat of Napoleon Bonaparte and ended his rule as Emperor of the French. Fought near the town of Waterloo in present-day Belgium, the battle involved British-led allied forces against the French army. The outcome significantly reshaped Europe, leading to a period of peace and stability, and Napoleon was subsequently exiled to the island of Saint Helena.