On June 18, 1815, the Duke of Wellington defeated Napoleon’s army at Waterloo, marking the end of the First French Empire. For eight grueling hours, the armies exchanged cannon shots, gunfire and sabre strikes, leaving 50,000 soldiers captured, wounded or dead. The battle was one of the deadliest of the century, but to the bewilderment of archaeologists, only one full skeleton has been found to this day.