Jean de Vienne was a French knight, general and admiral during the Hundred Years' War. As a young nobleman, he started his military career at the young age of 9, and was made a knight at 21. Aged 24, he was made Captain-General for the Franche-Comté. He was the governor of Calais when the city was taken by the English king Edward III, and was taken prisoner. In 1373, Charles V made him "Amiral de France". Wikipedia
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