The phrase comes from the Himno Nacional Mexicano, Mexico's national anthem, with lyrics written by Francisco González Bocanegra in 1853 and music composed by Jaime Nunó the following year. It was first performed in 1854 and later officially adopted as the national anthem. The opening line calls Mexicans to the cry of war and has become one of the country's most recognisable patriotic expressions. Online, the short shout is reused in sports clips, Independence Day posts and pride edits because listeners recognise it instantly.