If you watched The King's Speech, you know speech-challenged Prince Albert was thrust into power when his older brother, King Edward VIII, abdicated to marry twice-divorced American Wallis Simpson. As the Prince of Wales, Edward had a thing for married women. But when he decided he wanted Wallis as his wife, it caused scandal and cost him the throne after his less-than-one-year reign.
The drama continued after his death. Uncovered FBI files suggest Edward VIII was forced to abdicate not because of Wallis's divorcée status, but because she was a Nazi sympathizer, passing state secrets to her on-the-side Nazi lover.