The military leader known for his role in the Napoleonic Wars was Duke of Wellington, Arthur Wellesley. He gained prominence for his strategic acumen and leadership during the conflict against Napoleon Bonaparte's French forces. Wellington’s most notable victory came at the Battle of Waterloo in 1815, where he led an allied army to defeat Napoleon, effectively ending the emperor's rule. Wellington’s military tactics and political maneuvering established him as a key figure in European history. Following the wars, he became a prominent politician and served as Prime Minister of the United Kingdom, influencing British policies in the post-war era.