Lieutenant Tomas Urbina and his counterpart and fellow General Rodolfo Fierro, have been cited as the two halves of Pancho Villa, Fierro representing his more violent side.[2]
Urbina was executed by General Fierro under the accusation that he betrayed Pancho Villa during the Battle of El Ébano (Spanish: Batalla de El Ébano), a 72-day siege of the town of El Ébano in the state of San Luis Potosí, where Urbina finally surrendered his forces to the Constitutionalist faction, and allegedly received a sum of money for his surrender.