Background
The son of Jean-Gaspard de Montboissier, baron de Dienne (who died 1714) by his wife Marie-Claire (died 1730), daughter of Jean d"Estaing, marquis de Saillant, he was commissioned as a cavalry officer in the French Army.
The son of Jean-Gaspard de Montboissier, baron de Dienne (who died 1714) by his wife Marie-Claire (died 1730), daughter of Jean d"Estaing, marquis de Saillant, he was commissioned as a cavalry officer in the French Army.
He was promoted Brigadier-General in 1719, Maréchal de camp in 1734 and Lieutenant-General in 1738. The Marquis also served as Ambassador to Rome, before being posted to London.