Joaquín Pérez Martín-Parapar was a railway man by profession, but after the outbreak of the Spanish Civil War, joined the Republican militias.
As a result of this operation, his boss, Major Blas, was dismissed, and replaced by Joaquín Pérez Martín-Parapar, the eldest of the militias.
The 56th Mixed Brigade was formed in January 1937, in the sub-sector of Almería, under the command of the Joaquín Pérez Martín de Parapar major.
On December 15, he was appointed to cover the passive front of Hinojosa del Duque, in which he remained successful during the battle of Peñarroya and stayed there until the end of the war.
Captured by the Francoists at the end of the war, as they always did to the one who had successfully confronted them, he was decreed guilty of rebellion armed with the maximum penalty, the execution in the city of Guadalajara in early 1941.