Henri-Louis-Gustave Guillaume

Baron Henri Louis Gustave Guillaume (1812–1877), generally going by Gustave Guillaume, was a French-born Belgian army officer and military historian who served as Minister of War from 1870 to 1873.

Life Guillaume was born in Amiens, France, on 5 March 1812. He was living in Charleroi when the Belgian Revolution broke out in 1830, and immediately joined the revolutionary forces, becoming secretary to Léonard Greindl (a future minister of war) just as the surrender of the Dutch garrison in Charleroi was being negotiated. On 20 October he was appointed second lieutenant in the 3rd Regiment of the Line.

In 1837 Guillaume transferred to the 8th Regiment of the Line with the rank of captain (second class), and the following year to the newly formed Grenadier Regiment. On 27 November 1843 he was sent the Royal Military Academy, and on 19 July 1845 promoted to captain (first class). Histoire de l'infanterie wallonne sous la maison d'Espagne, 1500–1800 (1878)