Discover why Napoleon really lost the Waterloo Campaign Napoleon was betrayed during 1815 There is no doubt of this. The Traitors admitted as much, and the Allied powers documented their acts. In the immediate aftermath of Napoleon's defeat at Waterloo, many French considered treason as the primary cause. But over the next 100 years, a conventional narrative of the campaign coalesced, and acts like Bourmont's defection were downplayed and sanitized to the point of meriting barely a mention in many histories. Since the early 20th century, while the details have improved, the same basic story...