François-Josué de La Corne Dubreuil was a French military officer in the colonial regular troops of New France and, as was the norm of the day, involved in family commercial enterprises. He was the son of Jean-Louis de la Corne de Chaptes and a brother of Louis de la Corne, Chevalier de la Corne, and Luc de la Corne. His first posting as a commandant of a post was at the Fort Kaministiquia, beginning in 1741, where he also engaged in the fur trade.