Sidronio Camacho was one of the soldiers of Emiliano Zapata during the Mexican Revolution, and the killer of Emiliano's brother, Eufemio. On June 18, 1917, Camacho killed Emiliano's brother, Eufemio Zapata, who had beaten up Camacho's father, at the time Eufemio's second in command, supposedly for drunkenness (according to some sources it was Eufemio who was drunk, not Sidronio's father ), at Cuautla, Mexico. Sidronio avenged his father by shooting Eufemio in the abdomen. He then threw his still living victim on an anthill. This event earned him the nickname, "el loco Sidronio" ("the crazy Sidronio").