Duchambon and Michel Du Pont de Renon, hastened the military advancement of his surviving sons.  François Du Pont Duvivier, the eldest, became a cadet in 1716, a midshipman at Rochefort , France, in 1718, and returned to Louisbourg as an ensign in 1719.  The two others, Joseph Du Pont Duvivier and Michel Du Pont de Gourville, soon joined their