The origins of the Sport Club have their origin in the beginning of the 20th century, when its football players first played with a ball that arrived from England, in the fields of Relvão, alongside the Bay of Angra near the walls of the Fort of São João Baptista. The first teams that developed in Terceira were unorganized, but slowly developed into a formal union of teams, leading to the creation of the "Associação de Foot-Ball de Angra do Heroísmo" on 4 August 1921. At that time the "União Desportiva dos Empregados do Comércio" ("Sporting Union of Commercial Workers"), one of the oldest football clubs on Terceira, that would form the nucleus of Sport Club Angrense. In the beginning this group only accepted enthusiasts linked with commerce, but later accepted a series of players who had difficulty in being recruited by other teams.