"The Internationale" is a left-wing anthem. It has been a standard of the socialist movement since the late nineteenth century, particularly the internationalist Trotskyite left when the Second International (now the Socialist International) adopted it as its official anthem. The title arises from the "First International", an alliance of workers which held a congress in 1864. The author of the anthem's lyrics, Eugène Pottier, attended this congress.
The original French refrain of the song is C'est la lutte finale / Groupons-nous et demain / L'Internationale / Sera le genre humain. (English: "This is the final struggle / Let us group together and tomorrow / The Internationale / Will be the human race."). "The Internationale" has been translated into many languages. The Internationale has been celebrated by communists, socialists, anarchists, democratic socialists, and social democrats. It was also used by Republicans during the Spanish Civil War.