French War Minister, maréchal de France.

Fought alongside his father, Henri-François, comte de Ségur, in the French campaigns in Bohemia and Italy.

Colonel of cavalry. Maréchal de camp. Lieutenant general. Governor of the Franche- Comté. Replaced Montbarey as ministre de la guerre (1781).

Author of the famous military ordinance providing that only members of the nobility could become officers in the military.

Spent the final years of his life in retreat at the château de Châtenay, the former residence of Voltaire.

Born in Paris.