Officer in the American service.

Sous-lieutenant in the cavalry regiment of the duc de Noailles (1772-76). Went to America with the commission of captain (1777). Aide-de-camp to the baron Kalb, major (1777), and lieutenant colonel (1778). Severely wounded and captured while trying to protect his general at the battle of Camden (1780). Named brigadier general by North Carolina in reward for his conduct.

Returned to France and became Franklin’s correspondent (1781). Chevalier de Saint- Louis (1785). Unable to rejoin the American army, he eventually died of his wounds.

Born in Treban, Allier. Alternate form of the name: Dubuysson des Hays or Hayes.