On this day, in 1478, George Plantagenet was executed for treason against his brother King Edward IV — famously supposed (as in Shakespeare’s Richard III) to have been drowned in a butt of malmsey wine. George Plantagenet, Duke of Clarence, played an important role in the long-waged War of the Roses, a series of dynastic wars, battles, and skirmishes between 1455 and 1487 between supporters of rival branches of the House of Plantagenet for the English crown: the House of Lancaster versus the House of York. Plantagenet originally supported his brother’s claim to the throne. Through a series of battles...