in the Spanish language), also known as El Chucho Quién Sabe?, is a 1966 Italian Zapata Western film directed by Damiano Damiani and starring Gian Maria Volonté, Lou Castel, Klaus Kinski and Martine Beswick.

During the Mexican Revolution, a Durango-bound government munitions train is forced to stop due to the presence of a crucified federal army officer on the tracks.

El Chucho/Chuncho Muños, an arrogant gun runner and guerrilla figure who is loyal to the Zapatist revolutionary leader General Elías, leads his gang in an assault on the train.

Posing as a former prisoner of the army, Tate joins the gang and is quickly befriended by Chuncho, who nicknames him "Niño" (which means "Kid" in Spanish).

Rosaria, Felipe's spirited wife, attempts to defend him; when Chuncho's men assault her, Tate angrily berates them for their behavior.

Eventually missing his bandit lifestyle, Chuncho leaves San Miguel under the care of El Santo, his priestly half-brother, on the pretext of recovering a gold-plated Hotchkiss M1914 machine gun from his former gang.

Chuncho sells the guns and is paid five thousand pesos before learning from Elías that the people of San Miguel were massacred by the army while he was away.

The police arrive at the station and Tate's body begins its return to the United States while Chuncho, laughing maniacally, tosses his bag of money to a group of peasants near him and flees from the authorities down an external corridor of carriages, happily shouting and exhorting the poor to buy dynamite instead of bread.

"[7] Damiano's film has been called a "serious statement about the Mexican Revolution" and has been recognised as an accomplished blend of "tension, action, politics and history".