Here's something to add to the confusion:

El Quinto Regimiento El diez y ocho dia de julio En el patio de un convento, El pueblo madrileño Fondo el Quinto Regimiento. Chorus: Venga, jaleo, jaleo - Sueño de una ametralladora, Y Franco se va paseo Y Franco se va paseo. Con Lister Campesino, Con Galan y Modesto, Con el comandante Carlos, No hay miliciano con miedo. (Repeat Chorus) Son los cuatro batallones Que Madrid estan defendiendo; Se va lo mejor de España, La flor mas roja del pueblo. (Repeat Chorus) Con el quinto, quinto, quinto, Con el Quinto Regimiento, Madre, yo me voy al frente Porque quiero entrar en fuego. (Repeat Chorus)

THE FIFTH REGIMENT On the eighteenth of July In a lovely Spanish patio, Madrid's anti-fascist heroes Formed the Quinto Regimiento. Chorus: Come and be happy, be happy (or Venga, jaleo, jaleo) Hear that avenging machine gun It will be the end of Franco! It will be the end of Franco! With Lister and Campesino, With Galan and with Modesto, With the great commander Carlos, There is none who fears the battle. (Repeat Chorus) In the four heroic batallions Madrid so bravely defending Fighting in Spain's fiercest battles Are the bravest of every village. (Repeat Chorus) With the quinto, quinto, quinto With the Quinto Regimiento For the front, madre, I'm leaving For I, too, would kill the Fascists (Repeat Chorus)

Notes:

QUINTO REGIMIENTO (Fifth Regiment). The Fifth Regiment was formed by the Spanish Communist Party in July, 1936, the first month of Franco's rebellion, and by December was the backbone of the defense of Madrid with 70,000 men. Other political parties (Socialist, Anarchist, Republican) also recruited their own membership but these early, purely political units were broken up and reorganized in 1937 and put under unified command. (Cf. Lift Every Voice., ed. Irwin Silber, NY, People's Artists, Inc., 1953). This song is also a melodic composite, the first part being an Andalusian fo1k-song, "El Vito," the second, beginning with "Venga jaleo..." derives from a tune called "El Contrabandista." The words of course, are new and were supplied at the time and place, but the composite may have been known in Spain earlier, with an older set of lyrics.