FJ was founded by José de las Heras and Juan Ignacio González, and later joined by between 100 and 300 members during that year.

FJ was opposed to the "parliamentary way" of Fuerza Nueva and FE-JONS, defending also the lack of utility of peaceful demonstrations, supporting the creation of paramilitary units to fight against "marxism".

[6] One of the first actions of the group was taking part in the neofascist assault against the Law Faculty of the Complutense University of Madrid in 1979, along with members of Fuerza Joven and FE-JONS.

[citation needed] Twenty-four members were arrested in the cities of Madrid and València on 26 January 1981, for various robberies carried out to fund the organization.

[13] The historic leader of the group, José de las Heras Hurtado, was in search and seizure since 1984, after failing to appear in the El Parnasillo bombing trial.