Los Fronterizos, an Argentine folk group from Salta, was formed in 1953. The original lineup was a trio consisting of Gerardo López, Carlos Barbarán, and Emilio Solá. In 1954, Solá left and was replaced by Cacho Valdez, who was soon succeeded by Eduardo Madeo. Guitarist Juan Carlos Moreno later joined, forming the quartet that recorded the group’s first singles. In 1956, César Isella replaced Barbarán, and the group later traveled to Buenos Aires to appear on radio programs. Their major international breakthrough came in 1964 with the recording of Ariel Ramírez’s Misa Criolla, which led to worldwide recognition and performances in major concert halls. In 1966, Isella left the group due to political differences and was replaced by Eduardo “Yayo” Quesada. Despite multiple lineup changes over the following decades, Los Fronterizos continued touring extensively across Latin America and Europe. The group received the Konex Award (Diploma of Merit) in 1987 as one of the five best Argentine folk groups of the decade.