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
Corps style band Often, musical elements from this variation of show band incorporate contemporary popular music and traditional rhythm and blues. Many of these bands maintain a twirling line, as well as a dancer line instead of a color guard. The other major derivation of show band can be observed in bands such as University of Texas, or Ohio State University. Although one could argue that both these bands have such rich and longstanding traditions which predate the formation of drum corps, they could be considered a style unto themselves. However, these bands serve more as the foundation of the show band style,