3 of the Legion was raised on 1 January 1940 in Spanish Protectorate of Morocco.
Today it consists of two battalions: The War Band of the King Alfonso XIII Light Infantry Brigade is the military band of the entire brigade, currently under the operational command of the 3rd legion and under the direction of Fernando Lizana Lozano.
During the Civil War, it was the largest music band that the Tercio has had in its entire history with almost 150 instrumentalists.
In 1981, the band of the legion was transferred to Ronda and, finally, in 1995 the War Band was created in the Legion Brigade.
In 1954, these formations were dissolved to create a single 90-place band attached to the second 3rd Legion, which had a long history until 1989, when it disappeared, becoming the band of the Military Government of Ceuta.