El Salvador won 3–2 after extra time. On 14 July, as a result of existing tensions being exacerbated by these matches, the two countries began the hundred-hour-long conflict known as the Football War. As a result, El Salvador and Honduras were both disqualified from entering 1969 CONCACAF Championship qualification. In the deciding World Cup qualifier, El Salvador faced Haiti. El Salvador won the away leg 2–1, with goals from Elmer Acevedo and Mauricio "Pipo" Rodríguez, but lost the second leg 3–0 at home. El Salvador finally won the play-off on 8 October with a goal by Juan Ramón "Mon" Martínez in extra time, allowing them to qualify for the World Cup finals at the first attempt. "El Pajaro Picón Picón" was a Colombian song written by Eliseo Herrera which was very popular in El Salvador during the World Cup qualifying stages. During a radio show, Mauricio Bojórquez parodied the song, which he named "Arriba con la Selección". That parody became so famous that it became the official anthem of the El Salvador national football team. 1970s In the World Cup finals El Salvador were drawn into a group with Belgium, Mexico and the Soviet Union. El Salvador lost their first game 3–0 to Belgium in Mexico City on 3 June. The second match, against Mexico on 7 June, was marred by a controversial call near the end of the first half, with the score still at 0–0. The Egyptian referee Ali Kandil appeared to signal for a free kick to El Salvador in their own half. However, a Mexican player took the kick, passing to Javier Valdivia, who scored. The Salvadoran players protested vigorously, to the extent of physically jostling the Bermudan linesman, Keith Dunstan, but the goal was allowed to stand. El Salvador restarted the game by kicking the ball into the crowd in protest. They eventually lost 4–0. The team's third game took place on 10 June, with El Salvador losing 2–0 to the Soviet Union to finish at the bottom of Group A. El Salvador advanced from the first round of 1971 CONCACAF Championship qualification by beating Nicaragua 4–2 on aggregate. In the second round, they withdrew from their play-off against Honduras, allowing their opponents to qualify by default. The national team also took part in the 1973 CONCACAF Championship qualification, which doubled as qualification for the 1974 World Cup, but they did not advance to the