Mariachi was heavily involved in cultural promotion as a way to create a unified Mexican identity after the end of the Mexican Revolution. One of these efforts was the promotion of mariachi as an international symbol of Mexican identity, first with radio and sound recordings and later with films. Mexico built a nationwide radio broadcasting network in the 1920s such as XEB and XEW, which began broadcasting mariachi music as a media production, rather than as a music for social events. This music was already being modified in part due to the advent of sound recording. For example, most son jaliscense
El Mariachi player, and proceeds to taunt and laugh at the Mariachi. Overcome with grief and rage, the Mariachi picks up Azul's gun with his right hand and kills Moco, taking revenge for Dominó's death. Moco's surviving henchmen, seeing their leader dead, walk off and leave Moco's body and the wounded Mariachi behind. The Mariachi leaves the town on Dominó's motorbike, taking her pit bull and her letter-opener by which to remember her. His dreams to become a mariachi have been shattered, and his only protection for his future are Azul's former weapons which he takes along in the guitar case. The