Served briefly in the French army. Joined the navy (1728); served with distinction and rose to the rank of capitaine de vaisseau (1754) and chef d’escadre (1764). Chevalier de Saint-Louis (1746); commander of the order of Saint-Louis (1764). Lieutenant general (1777) and commander of the French fleet at Brest in the Revolutionary War. Retired (1783); emigrated (1780).