This month marks the 204th anniversary of the Battle of Waterloo, a battle which is often described as changing the future of European history. It was Napoleon's last battle, a crushing defeat, but also, to use Wellington's own words 'A near run thing'. (He even said 'I don't think it would have done if I had not been there!). More recently though, historians have started to question Waterloo, and its significance. Charles Esdaile, for example has described Waterloo as 'A Glorious Irrelevance' as a battle with the same kind of impact would have happened at some point anyway. So why does Waterloo matter?