His real name was Guillaume Joseph Roussel, and was nicknamed Cadet as he was the youngest member of his family. Born in 1743 in the Doubs, he moved to Auxerre in 1763, firstly as a servant and footman and then as a bailiff’s clerk. During the French Revolution, he became a Jacobite. One of his political enemies, the knight Chenu de Souchet, composed a famous song to make fun of him. This song was adopted as the marching song for soldiers during the Revolution in 1792 and so spread throughout France … (Tourism Office of Auxerre)