Present in Mayotte in various forms and under different names since 1967, the 5th Foreign Regiment (5RE) established itself under its current name on the Rocher at Dzaoudzi on 1 April 1976. Comprising a permanent command and logistics company and an infantry company on short-duration deployment, it today has nearly 300 personnel.

The 2nd Foreign Infantry Regiment (2e REI) is one of the two infantry regiments of the French Foreign Legion within the 6th Light Armored Brigade. Second among the Foreign Regiments, it was created in 1841. Stationed in Nîmes since 1983, it brings together more than 1,300 service members, including operational reservists, and around thirty civilians.

Created on 1 July 1999, the 2nd Foreign Engineer Regiment (2e REG) established itself at Saint-Christol d’Albion, in the Vaucluse department, on the grounds of Air Base 200. It inherits the historical heritage and traditions of the eighteen Foreign Legion engineer formations that served in Indochina. From its inception, it has taken part in multiple operations, sometimes over long periods, such as KFOR in Kosovo, to which the regiment contributed from 1999 to 2008. In 2000–2001, it was deployed in Bosnia as part of SFOR, then in Côte d’Ivoire from 2005 to 2007 and again in 2011 (Operation LICORNE).