"Until Forever, Commander" is a 1965 song by Cuban composer Carlos Puebla. The song's lyrics are a reply to the farewell letter of revolutionary Che Guevara when he left Cuba, in order to foster revolution in the Congo and later Bolivia, where he was captured and killed.
The lyrics recount key moments of the Cuban Revolution, describing Che Guevara and his role as a revolutionary commander. The song became iconic after Guevara's death, and many left-leaning artists did their own cover versions of the song afterwards. The title is a part of Guevara's well known saying "¡Hasta la victoria siempre!" ("Until victory, always!").
The song has been covered numerous times.