== Legión Extranjera == 

 This unit was founded in 1920 with the name "Tercio de Extranjeros" but it was informally called "La Legión" or "La Legión Extranjera" because it was founded and modelled after the French Foreign Legion. 

 In 1925 the name was oficially shortened to el "Tercio" and in 1937 to la "Legión".