The battle of Waterloo (the last engagement of Napoleon’s so-called Hundred Days) was fought on Sunday 18 June 1815, just south of Brussels in modern Belgium. It began late in the morning, as the French Emperor waited for the ground to dry after the soaking rain of previous days, but once battle was joined it raged until evening. What has all that got to do with Magna Carta? Watch Magna Carta Unlocked to find out.