Peter, Paul, and Mary's 1966 recording of 'El Salvador' stands as a defining moment in the folk revival, blending traditional Mexican folkloric elements with the group's signature harmonies. The song, originally a Mexican folk tune, was adapted and popularized by the trio, who infused it with a poignant narrative about the struggles of the working class in Central America. Their version, released on the 'Peter, Paul and Mary' album, became a staple of their discography and a favorite among folk enthusiasts. The track exemplifies the group's commitment to social commentary and cultural preservation, capturing the spirit of the era while introducing international folk traditions to a broader American audience.