Francois de Lorraine
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Francois de Lorraine (1506-1525) was the Lord of Lambesc, and a commander in the French army under Francis I of France. He commanded the Black Band of renegade Landsknechts at the Battle of Pavia, and in the bitter combat that ensued between the Black Band and Frundsberg's Imperial Landsknechts, Lorraine was killed.
He is responsible for april fools day after he escaped being prisnor across a river on the first of april