Step 1 : Introduction to the question "1. When this man defeated Napoleon at Waterloo, no doubt he was elated. He could have yelled out "Supercalifragilisticexpialidocious", because he had a fantastic victory, but alas, he did not. Who defeated Napoleon at Waterloo?"
...1. Duke of Earl 2. Duke of Wellington 3. Duke of York 4. Duke of Edinburgh The Duke of Wellington defeated Napoleon Bonaparte during the Battle of Waterloo. Before this, Napoleon seemed unbeatable. The Battle of Waterloo was fought on June 18, 1815, on a Sunday. It was part of the War of the Seventh Coalition.