Marie Armand Patrice de Mac Mahon, known as Patrice de Mac Mahon (10 June 1855, Outreau – 23 May 1927, Paris), 2nd Duke of Magenta and 6th Marquis d'Éguilly in 1893, was a French soldier and aristocrat.
The eldest son of Patrice de MacMahon, Duke of Magenta, and Elisabeth de La Croix de Castries. MacMahon joined the Special Military School of Saint-Cyr in 1873 until 1875 (promotion of Archduke Albert). On the death of his father, he inherited the ducal title Duc de Magenta in 1893. The following year, on the death of his cousin, Charles-Marie MacMahon (1856-1894), Marie inherited the title, Marquis Éguilly in 1894 which was later changed to Marquis de MacMahon.
He participated in the conquest of Madagascar (1883-1896). He was then Battalion Commander from 28 October 1895, he was then appointed head of the 2nd battalion of Foot Hunters in 1896 and remained so until 1904.
After serving in the 129th Infantry Regiment as a lieutenant colonel between 24 December 1912 and 13 October 1914. Also, with the rank of colonel of the 35th Infantry Regiment and the 14th Infantry Division under the command of General Louis Pastor and Etienne de Villaret, as well as Colonel of the 7th army corps commanded by General Louis Bonneau.
He fought in World War I during which he commanded the 43rd Brigade, before being promoted to Brigadier General on 15 February 1915.
From 1924, he lived at 17, Boulevard Raspail. MacMahon died in 1927.
Marie Armand Patrice married in a civil ceremony, Princess Marguerite Françoise Marie Louise, daughter of Prince Robert, Duke of Chartres and Princess Françoise of Orléans on 22 April 1896. On the 23rd he had a religious ceremony in the chapel of the Chateau of Chantilly.