Negros Mascogos (The Mascogo Blacks) It is a colony of Afro-American immigrants in Coahuila, direct descendants of American slaves in the 19th century, who maintain their traditions: dance, music the region, driven by the Second World War and later by the Korean War. Currently fluorite, barite, coal, silver and lead companies are part of the economic development of the region, together with the maquiladoras and yhe established commerce.