A Bullet for the General (original Italian title: Quién sabe?, which means “Who knows?” 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. It tells the story of El Chuncho, a bandit, and Bill Tate (or El Niño/The Kid), a counter-revolutionary contract killer in Mexico. Chuncho soon learns that social revolution is more important than mere money.

A band of Mexican gunrunners employed by a revolutionary General accept an American mercenary into their gang, unaware of his true intentions.