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| Brandt Mle 27/31 | |
|---|---|
| Name | Brandt Mle 27/31 |
| Type | Mortar |
| Origin | France |
| Service | 1927–1960s |
| Designer | Edgar Brandt |
| Design date | 1927 |
| Manufacturer | Atelier de Fabrication de Puteaux |
| Production date | 1931–1940s |
| Caliber | 81 mm |
| Range | 3.2 km |
Brandt Mle 27/31 is a French 81 mm infantry mortar developed in the interwar period for indirect fire support with portable, crew-served capability. Conceived by the industrialist and designer Edgar Brandt, it became a standard issue for the French Army and was widely exported and adapted by several armed forces during and after the Second World War. The design influenced subsequent mortar development and saw action in multiple theatres from Europe to Asia and Africa.
The design emerged from post-World War I efforts by Edgar Brandt and Atelier de Fabrication de Puteaux to produce a medium-weight mortar bridging the gap between light infantry mortars and heavy trench mortars. Influences included French Army requirements formulated after the Battle of Verdun and lessons drawn from munitions work associated with firms like Hotchkiss et Cie and Société française des munitions; the weapon incorporated innovations in recoil absorption and sighting derived from earlier systems used by the French Army (Third Republic). Early trials involved evaluations alongside designs presented at exhibitions such as the Paris Salon and technical committees linked to the Ministry of Armaments (France), with production standardized in 1931 to meet mobilization plans of the French Armed Forces.
The mortar is an 81 mm smoothbore, muzzle-loading tube with a conventional baseplate and bipod arrangement, rated for a maximum range around 3,200 metres. Construction used steel alloys produced by industrial conglomerates comparable to Compagnie des Forges et Aciéries de la Marine et d'Homécourt and manufacturing lines similar to those at state arsenals like Châtellerault. Elevation and traverse mechanisms allowed for rapid changes in fire, aided by graduated sighting equipment influenced by devices used by the Royal Ordnance Factories and the Heereswaffenamt. Typical crew drill drew from French infantry doctrine promulgated in manuals from institutions such as the École de Guerre and the Centre des hautes études militaires.
Ammunition types included high-explosive, smoke, and illuminating rounds compatible with propellant increments to vary range, drawing on ballistic curves established by ballistics research groups at École Polytechnique and ordnance bureaus akin to the Service technique de l'armement. The firing mechanism used a fixed firing pin at the breech; bombs were dropped down the tube to strike the pin and detonate. Crew procedures mirrored drills codified by the French Foreign Legion and combined-arms doctrines emphasized coordination with infantry formations like those of the Infanterie Division and support from units comparable to the Cavalry Corps.
Adopted in the early 1930s, it equipped formations of the French Army (Third Republic) during the Battle of France and was captured and repurposed by the Wehrmacht after 1940, appearing in Wehrmacht inventories alongside captured materiel from manufacturers such as MAS-36 producers. Allied and Axis forces used it through World War II in campaigns including North African Campaign and the Italian Campaign; postwar, it remained in service with French forces during conflicts like the First Indochina War and the Algerian War before being progressively replaced by designs originating from NATO research groups and manufacturers tied to the Western European Union standardization efforts.
Licensed and unlicensed copies led to several national variants; industrial adaptations by firms in states such as Sweden and Japan produced locally modified systems with altered sighting and mounting hardware. German use led to field modifications by units of the Heer and adaptations for motorized transport by formations like the Panzergrenadier units. Postwar, updated barrels, baseplates, and sighting gear reflecting developments at establishments like the Ballistic Research Laboratory found their way into refurbished examples used by former colonial forces and export customers, similar to the modernization paths of other interwar weapons.
Major users included the French Army (Third Republic), captured inventories used by the Wehrmacht, and postwar French forces in overseas territories. Export customers and operators ranged from European militaries to colonial and independent states across Africa and Asia; notable deployments occurred with units in the Free French Forces and various postwar armies trained in military academies such as the École Militaire Interarmes. Insurgent and irregular forces also employed captured and surplus stocks in conflicts paralleling those involving weapons from manufacturers like Sturmgewehr 44 producers.
The mortar's widespread adoption and the export of both original and copied examples influenced later 81 mm mortar designs fielded by NATO members and Warsaw Pact states, informing doctrines taught at institutions like the NATO Defense College and matériel standards discussed in forums including the Conference of National Armaments Directors. Its balance of portability and firepower contributed to the development of modern infantry indirect fire support systems adopted by armed formations modeled on lessons from campaigns such as the Battle of El Alamein and the Normandy Campaign. Collectors and historians reference the weapon in studies at museums such as the Musée de l'Armée and in publications produced by organizations like the International Institute for Strategic Studies.
Category:Mortars Category:Weapons of France Category:Military equipment introduced in the 1920s