The Conventionists were a faction led by Pancho Villa and Emiliano Zapata which grew in opposition to the Constitutionalists of Venustiano Carranza and Álvaro Obregón during the Mexican Revolution. It was named for the Convention of Aguascalientes of October to November 1914.
Obregón defeated the Conventionists at the Battle of Celaya in April 1915.