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
Cocula, Jalisco Cuna del Mariachi," or "The Cradle of Mariachi," given that mariachi music originated there in the 19th century. As one enters or exits Cocula, two large arches, featuring two guitars or violins, bear the inscription "Bienvenidos a Cocula, Cuna Mundial del Mariachi." Many well known mariachi groups have come from Cocula and surrounding areas. A famous Mexican Artist named Jorge Negrete sang a song called "Cocula" that talks about this town and how mariachi originated there. Cocula, Jalisco Cocula ( "ondulated place") is a city and municipality in the Mexican state of Jalisco. It is located 35 miles (56 km)