From November 1, 1949, to April 8, 1955, the regiment's status passed to a Marching Battalion of the 21st Colonial Infantry Regiment BM/21ᵉ RIC.
Following the liberation of France and the Allied invasion, the regiment's battalions served in Indochina where the regiment was recreated on November 1954 from three African marching battalions of the CEFEO.
Dissolved again on March 22, 1955, the regiment was recreated on May 16, 1955, as 21ᵉ RIC.
On December 1, 1958, the regiment was designated as 21 Marine Infantry Regiment in Germany FFA.

Following campaigns in Indochina from September 1945 to July 1954.
Relaying each turn in Cochinchine, in Annam and in Tonkin while cited twice, the regiment was awarded the fourragere with colors of the croix de guerre des théâtres d'opérations extérieures.

In 1956, the regiment departed to Algeria, partook in the Suez Crisis, then pursued missions in Kabylie until 1962.

The regiment returned to metropole in 1963 and garrisoned in Aisne.

Since 1963, the regiment belonged to the 8th Infantry Division until 1980.
Garrisoned in Fréjus in 1980, the regiment integrated the 31st Brigade in 1981, which packed squadrons of AMX 10 RC, the 21ᵉ was a mixed regiment, the only in France, composed of 2 squadrons of AMX 10 RC, 2 companies of VAB, one Artillery battery, one company of reconnaissance and support VAB, one command company VAB and one instruction company.
The regiment composed with the 2nd Foreign Infantry Regiment 2 ᵉ REI, the units of the 31st Brigade.
The brigade was dissolved in 1984.

The regiment as well as the museum of the Troupes de marine is garrisoned at Fréjus, the previous garrison of the 4th Marine Infantry Regiment.
The regiment is part of the 6th Light Armoured Brigade.

In recent years the 21ᵉ RIMa has been engaged in theatres in central-Europe.
The regiment was cited at the orders of the brigade for action in Kosovo in 1999.
The regiment can be deployed in overseas missions or fill the service of missions in service of the public in metropolitan France.
The regiment is the designated guardian of the traditions of the Troupes de Marine.
From November 1, 1949, to April 8, 1955, the regiment's status passed to a Marching Battalion of the 21st Colonial Infantry Regiment BM/21ᵉ RIC. Following the liberation of France and the Allied invasion, the regiment's battalions served in Indochina where the regiment was recreated on November 1954 from three African marching battalions of the CEFEO. Dissolved again on March 22, 1955, the regiment was recreated on May 16, 1955, as 21ᵉ RIC. On December 1, 1958, the regiment was designated as 21 Marine Infantry Regiment in Germany FFA.
Following campaigns in Indochina from September 1945 to July 1954. Relaying each turn in Cochinchine, in Annam and in Tonkin while cited twice, the regiment was awarded the fourragere with colors of the croix de guerre des théâtres d'opérations extérieures.
In 1956, the regiment departed to Algeria, partook in the Suez Crisis, then pursued missions in Kabylie until 1962.
The regiment returned to metropole in 1963 and garrisoned in Aisne.
Since 1963, the regiment belonged to the 8th Infantry Division until 1980. Garrisoned in Fréjus in 1980, the regiment integrated the 31st Brigade in 1981, which packed squadrons of AMX 10 RC, the 21ᵉ was a mixed regiment, the only in France, composed of 2 squadrons of AMX 10 RC, 2 companies of VAB, one Artillery battery, one company of reconnaissance and support VAB, one command company VAB and one instruction company. The regiment composed with the 2nd Foreign Infantry Regiment 2 ᵉ REI, the units of the 31st Brigade. The brigade was dissolved in 1984.
The regiment as well as the museum of the Troupes de marine is garrisoned at Fréjus, the previous garrison of the 4th Marine Infantry Regiment. The regiment is part of the 6th Light Armoured Brigade.
In recent years the 21ᵉ RIMa has been engaged in theatres in central-Europe. The regiment was cited at the orders of the brigade for action in Kosovo in 1999. The regiment can be deployed in overseas missions or fill the service of missions in service of the public in metropolitan France. The regiment is the designated guardian of the traditions of the Troupes de Marine.
21st Marine Infantry Regiment