Legión Extranjera (CMLL)
Legion Extranjera was CMLL's top rudo faction in the year of 2004. Pierroth Jr., Tarzan Boy and Vampiro Canadiense joined forces. They feuded with technicos Negro Casas, Shocker and Perro Aguayo Jr.. The two factions finally faced off in a six-man cage match on July 18 where the last man in the cage got his head shaved. The rudos quickly escaped and Shocker tricked Casas and made his own escape, leaving Casas and Perro Aguayo. Perro Aguayo was victorious and Negro Casas, who had acted like a mentor for a time before this, had his head shaved leading to hostility.
The feud continued but soon Vampiro was injured in a match against the original Máscara Sagrada and was replaced by Héctor Garza, who had just jumped from Asistencia Asesoría y Administración, in a trios match at Arena México. Over the next few weeks, Perro turned on Casas and joined Garza. Soon Tarzan Boy from Los Guerreros del Infierno joined with Perrito explaining that he and Garza could only trust other northerners and they quickly formed La Furia del Norte, effectively leaving Pierroth all alone.