In early 1920, Herrera was a rebel commander subordinate to General Manuel Pelaez. However, in March 1920, he surrendered to Carranza’s forces under the promise of amnesty and he was allowed to keep his rank of General.

In May 1920, Carranza’s government collapsed under pressure from forces supporting Álvaro Obregón. Carranza and his supporters attempted to flee Mexico City to Veracruz. At the Aljibes rail station, they were informed that the rail line had been severed and that Veracruz had fallen. So Carranza proposed to travel on foot north to San Luis Potosí. It was near the rural village of La Union that Carranza’s small party was joined by the forces of Rodolfo Herrera. Herrera offered to guide and escort Carranza’s party through the rugged rural area of northern Puebla. He escorted the party to the small settlement of Tlaxcalantongo. Herrera then excused himself by saying he had to attend to a wounded brother, but promised to return.

In the early morning of May 21, 1920, Carranza’s party was attacked by soldiers believed to be under the command of Herrera. When the dawn came, Carranza was discovered dead from several bullet wounds.

Herrera was ordered to Mexico City for questioning. Obregón denounced him for murder and treason. In the Capital, Herrera was questioned at length but not held. Seven months later, he was confined for a week in the military prison of Santiago Tlaltelolco. He was stripped of his military rank and cashiered out of the army, but otherwise allowed to go free.

Herrera was subsequently reinstated as a general during the presidency of Obregón, only to be dismissed again during the presidency of Lázaro Cárdenas.

Oh, first btw