The corrido (Spanish pronunciation: [koˈriðo]) is a famous narrative metrical tale and poetry that forms a ballad. The songs are often about oppression, history, daily life for criminals, the vaquero lifestyle, and other socially relevant topics. Corridos were widely popular during the Mexican Revolution and in the Southwestern American frontier as it was also a part of the development of Tejano and New Mexico music, which later influenced Western music. The corrido derives mainly from the romance and, in its most known form, consists of a salutation from the singer, a prologue to the story, the story itself, and a moral and farewell from the singer. In Mexico, it is still a popular genre today. Outside Mexico, corridos are popular in Chilean national celebrations of Fiestas Patrias. Corridos play an essential part in Mexican and Mexican American culture. The name comes from the Spanish word correr ("to run"). A typical corrido's formula is eight quatrains with four to six lines containing eight syllables. Corridos have a long history in Mexico, starting from the Mexican War of Independence in 1810 and throughout the Mexican Revolution. Until the arrival and success of electronic mass media (mid-20th century), the corrido served in Mexico as the leading informational and educational outlet, even with subversive purposes, due to an apparent linguistic and musical simplicity that lent itself to oral transmission. After the spread of radio and television, the genre evolved into a new stage and is still in maturation. Some scholars, however, consider the corrido dead or moribund in more recent times (see, e.g. Vicente T. Mendoza, El corrido mexicano, 1954). In more rural areas where Spanish and Mexican cultures have been preserved because of isolation, the romance has also taken on other forms related to the corrido. In New Mexico, for example, a story-song emerged during the colonial period known as an Indita, which loosely follows the format of a corrido, but is chanted rather than sung, similar to a Native American chant, hence the name Indita.