The British forces at the Battle of Waterloo were led by the Duke of Wellington, Arthur Wellesley. This decisive battle took place in 1815 and marked the end of the Napoleonic Wars, effectively leading to Napoleon Bonaparte's final defeat and exile. Wellington's strategic leadership was critical in coordinating the Allied forces against Napoleon, highlighting the importance of military alliances and tactics. The victory at Waterloo reshaped the geopolitical landscape of Europe and established a period of peace known as the Congress of Vienna.