Spanish heavy metal band Barricada was formed in the early '80s by singer/bassist Enrique "El Drogas" Villareal, who was joined by ex-Némesis guitarist Javier Hernández, drummer Mikel Astrain, and ex-Kafarmaún singer/guitarist Sergio Oses, making their live debut in 1982. Soon, guitarist Alfredo Piedrafita replaced Sergio Oses.