Particularly following World War I, the Foreign Legion grew exponentially reputable and important part in the French Army. Accordingly, new regiments have been formed which one of them was the 1st Foreign Cavalry Regiment 1er REC.
During the interwar period and in 1930, following the creation of the 5th Foreign Infantry Regiment 5e REI in Tonkin, the Legion stood strong at 30,000 Legionnaires . Accordingly, the need to organize the Legion was necessary and also the need to provide a clear structure of command that would safe keep the evolution of the legion in relation to the foreign service of its volunteers proved to be even more important. On March 2, 1931, the general staff headquarters of the Armies, a Général, signed the instruction of two formulations, which rather initial, would be the main founding legislative pillar acts of the Inspection of the Foreign Legion.
This reorganization has been mainly and for a while preoccupied by the intentions of the Colonel Paul-Frédéric Rollet while commanding the 1st Foreign Regiment 1er RE. Since 1928, Marshal of France Louis Franchet d'Espèrey exposed in reports argumenting in favor of a new organization of the legion in reason of the increase of general enlistments and the existence of combat regiments mainly depending on two different arms, the infantry and armoured cavalry.
The date of creation of the Inspection of the Foreign Legion was fixed on April 1, 1931. The inspection would be entrusted to a Général (or really exceptional Colonel), particularly specialized in Legion affairs.
On March 26, 1931, Colonel Rollet passed command of the 1st Foreign Regiment 1er to Colonel Nicolas. On April 1, 1931, Rollet was promoted to Général de brigade and assumed the function of the Général Inspector of the Foreign Legion. Until his retirement in 1935, Rollet would serve his tailored function in total submission while comforting the culture of the Legion and codifying the essence of traditions. The inspection would be dissolved when Général Rollet would leave active duty. In 1948, the Inspection would have been seen activated for 2 years under the command of Raoul Magrin-Vernerey. Dissolved again in 1950, the inspection reappeared as Autonomous Group of the Foreign Legion (G.A.L.E) commanded successively by generals Jean Olié and Paul Gardy whom were designated as général inspector. The Autonomous Group of the Foreign Legion (G.A.L.E) compromised then, 1 Headquarters Staff in Sidi bel-Abbès, the Communal Depot of the Foreign Regiments, the 1st Foreign Infantry Regiment 1er REI which regrouped all training/instruction units and the moral service for works of the Foreign Legion (S.O.M.L.E).
The inspection of the Foreign Legion would give later form to the Foreign Legion Command.

The 1st Foreign Regiment is a depot regiment of the Foreign Legion in the French Army. It is located at Aubagne.
The 1st Foreign Engineer Regiment is one of two combat engineer regiments of the Foreign Legion in the French Army. The regiment provides the combat engineering component of the 6th Light Armoured Brigade.
The 2nd Foreign Infantry Regiment is an infantry regiment of the Foreign Legion in the French Army. The regiment is one of two mechanized infantry regiments of the 6th Light Armoured Brigade.
The 6th Light Armoured Brigade is one of the eight inter-arm brigades which are at the disposition of the Commandement des Forces Terrestres. The headquarters of the brigade is situated in Nîmes. The brigade is capable of deploying to any exterior theatre of operation while delivering fire power, agility, and mobility.
Raoul Charles Magrin-Vernerey, also known as Ralph Monclar was a French officer and 2nd Inspector of the Foreign Legion who fought in World War I, World War II within the ranks of the Free French Forces and led the French Battalion in the Korean War. He was also one of the first senior officers to respond to the Appeal of 18 June.
The Foreign Legion Command (official) is the Command of the Foreign Legion in the French Army.

The Foreign Legion Detachment in Mayotte is a detachment of the Foreign Legion based on the island of Mayotte, near Madagascar. It is the smallest operational unit of the French Army. The main role of the detachment is to maintain a French presence in the region, enabling the French armed forces to quickly react to events in the Indian Ocean and the east coast of Africa.

The 6th Foreign Infantry Regiment was a Foreign Legion infantry regiment that served in the French Army from 1939 to 1941 and again from 1949 to 1955.

The Communal Depot of the Foreign Regiments (DCRE),, was the primary training formation of the Foreign Legion from 1933 to 1955.
Paul-Frédéric Rollet (1875–1941) was a French Army Général who led in the Marching Regiment of the Foreign Legion RMLE, and was the 1st Inspector of the Foreign Legion, a post which he created under his intentions. Rollet accumulated 41 years of military service out of which 33 were in the Legion and also planned the 100th anniversary of the legion on Camerone day of 30 April 1931. Consequently, he was responsible for creating many of the Legion's current traditions.
The Pioneers of the Foreign Legion are a "unit of tradition". They march at the head of Foreign Legion detachments during ceremonial parades. The Legion's Pioneers are bearded, wear buffalo leather aprons, and carry polished axes on their shoulders.
The Marching Regimentof the Foreign Legion (RMLE) was a French military unit that fought in World War I and World War II. Initially composed of marching regiments from the 1st Foreign Regiment of Sidi Bel Abbes and the 2nd Foreign Infantry Regiment of Saida, Algeria, it re-formed as the 3rd Foreign Infantry Regiment.
Bernard Goupil was a Général de division of the French Army and Commandant of the Foreign Legion.
Paul Gardy was Général de brigade of the French Army and Commandant of the Foreign Legion in 1951 and 1958.
Christophe de Saint Chamas is a Général de corps d'armée of the French Army and Commandant of the Foreign Legion.
Pierre Georges Fernand Darmuzai was a French Général who served an entire career in the formation of the Parachute Battalions and Regiments BEPs and REPs of the Foreign Legion.
Jacques Morin (1924-1995) was a French officer and company commander of the Parachute Company of the 3rd Foreign Infantry Regiment.
Bernard Colcomb is a Général of the French Army and Commandant of the Foreign Legion.
André Le Vert was a French general who served most of his career in the French Foreign Legion.
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