Esprit Victor Elisabeth Boniface de Castellane, comte de Castellane (21 March 178816 September 1862), was a French military officer and ultimately a Marshal of France. Early life He was a son of Boniface Louis André de Castellane (1758–1837) and Adélaïde Louise Guyonne de Rohan-Chabot (1761–1805), who was also known as Mademoiselle de Jarnac. After his mother's death, his father remarried, in 1810, to Alexandrine Charlotte de Rohan-Chabot (whose husband, Louis Alexandre, Duc de La Rochefoucauld, was killed during the September Massacres of the Reign of Terror). His paternal grandparents were Esprit François Henry, Marquis de Castellane and Louise Charlotte Armande Charron de Ménars. His maternal grandparents were Charles Rosalie de Rohan-Chabot, Lord of Clion, Maroite and Brassac, joint-Lord of the castellanies of Montagrier and Chapdeuil, Maréchal de camp (a son of Guy Auguste de Rohan-Chabot) and the former Guyonne Hyacinthe de Pons Saint-Maurice. His maternal uncle, Major-General Louis Guy Charles Guillaume de Rohan-Chabot married Lady Isabella FitzGerald (the youngest daughter of William FitzGerald, 2nd Duke of Leinster) and were the parents of Philippe de Rohan-Chabot, vicomte de Chabot and comte de Jarnac who served as the French Ambassador to the United Kingdom in 1871. Career Boniface de Castellane entered the French army on the day of the coronation of Napoléon I of France (December 2, 1804) as an enlisted soldier in the 5th Light Infantry Regiment. In February 1806 he was promoted to 2nd lieutenant in the 7th Dragoons. The same month he was transferred to the 24th Dragoons with whom he served in the Kingdom of Naples. In 1808 de Castellane followed general Georges Mouton into Spain as an aide-de-camp. When Napoléon returned to Germany in 1809, de Castellane followed and he fought in that campaign at Abensberg, Eckmühl, Ratisbon, Aspern-Essling and Wagram. Promoted to captain in 1810, he further served Mouton, by now count of Lobau, as aide-de-camp and he accompanied him into Russia where he served at Vitebsk, Smolensk and Borodino. In October 1812 he was made aide-de-camp of general Narbonne and was present at Krasnoi and the crossing of the Beresina. Promoted to major, he served in the personal protection detail of the emperor during the retreat. De Castellane was promoted to command of the 1st Regiment Garde d'Honneur in June 1813. During the German campaign he fought at Dresden. Restoration and July Monarchy In 1822 de Castellane was given command of a regiment of hussars