The club is the first soccer representative of the first port of Peru, Callao, which laid the foundations for future Chalacos clubs, going from being a school club to being a professional club, gaining recognition, prestige and trust among fans of the Callao, from Lima and Peru, since today there are many clubs with the name of Atlético Chalaco, but only one is the original and traditional. [At present, Atlético Chalaco is called the "Historical Soccer Heritage of the Constitutional Province of Callao ". He has several championships won at the district, regional and national level. In 1918 he obtained recognition as a national champion when he beat the team of the nascent Peruvian Football League, which he defeated by 2 to 1. He has been champion of the First Division of Peru on two occasions: 1930 and 1947. And he also has four runners-up. nationals those of 1948, 1957, 1958 and 1979. His classic and historic rival is Sport Boys, with whom he plays the Clásico Porteño as both clubs are from the Callao region, and are the most successful clubs in the famous Peruvian port. It also had rivalries with the Lima clubs, with which the Lima-Callao classics were born, among them was the Association Football Club, which would later merge with the Club Unión Ciclista Peruana, to form the Ciclista Lima Association club, a club that is its successor. And he not only wears the colors of his jersey, but also the nickname of Dean for his predecessor, who was the first Peruvian soccer club. Also with Alianza Lima with which he played the old classic Lima-Callao. Fierce encounters that delineated the cultural and social boundaries of Lima and Chalacos. His clothing is legendary, as it has the white and red colors that the Peruvian soccer team would later have. Through the ranks of "León Porteño", great players and scorers passed that nurtured and formed the character of Peruvian football, such as Telmo Carbajo, Claudio Martínez Bodero, Alfonso Saldarriaga, Enrique Salas, Antonio Maquilón, Manuel Puente, José Arana, Humberto Crescimbeni, René Rosasco, Domingo Raffo, Félix Mina, Carlos Torres, Andrés Bedoya, Óscar Arizaga, Augusto Prado. The club played for long periods at the Telmo Carbajo stadium until its discontinuation due to the inauguration of the Miguel Grau stadium. The old model stadium later named in honor of the greatest idol of Atlético Chalaco, Telmo Carbajo, was always the stronghold of the chalaca fury that every day could be heard rumbling with a loud voice "chalaco fury, chalaco fury". Currently the Chalaco has returned to train at his home, the Telmo Carbajo stadium. The club also participates in junior, youth and master football tournaments. Wikipedia