Edmé-Martin Vandermaesen (Versailles, 11 November 1767 - 1 September 1813; also spelled Vander Maesen) was a French general of the French Revolutionary Wars and the Napoleonic Wars. He was killed in action while leading his troops to safety after the Battle of San Marcial in the Peninsular War.
Vandermaesen joined the Army in 1782 in the Touraine Regiment as a foot soldier, rising to lieutenant in 1792. He was employed as an instructor for the Jura battalion, then put in charge of the logistics, and eventually took command of the Jura battalion after a promotion to adjudant-major. He took part in the Battle of Wissembourg and in engagements in Haguenau, Vandenheim and Landau. General Michaud gave him command of the grenadiers of the division and sent him to capture the town of Brumpt, where a violent engagement occurred; Vandermaesen was wounded by a gunshot in the leg.
In early 1794, he was promoted to chief of brigade (equivalent to a colonel), taking command of the 14th demi-brigade. He took part in fights at Mannheim, and led the crossing of the Rhine at Spire. Vandermaesen's and Decaen's units captured Frankenthal. The 14th demi-brigade was renamed 62nd demi-brigade, and took part in the battles of Offenburg, Rincken, Rastadt, Masch, Nerescheim, Geisenfeld, Neuboarg, Lesenfeld, and Biberach.
Besieged in Kehl with the French Army, Vandermaesen conducted a number of sorties; under orders from Decaen, he retook advanced positions captured by the Austrians.
The French Army crossed the Rhine again but was soon recalled after peace talks occurred in Leoben. At this time, Vandermaesen relinquished the command of the 62nd demi-brigade and took that of the 53rd, in the vanguard of the Army of Danube. At Ostrach, he was sent on a reconnaissance, taking a hundred prisoners; the next day, superior forces threatening to cut him from the French main corps, he was forced to retreat. Vandermaesen forced his way back to the main body of the French troops, and was again shot in the leg. He was mentioned in the report of Jean-Baptiste Jourdan about the affair, earning the rank of general of brigade.