The Constitutional Army (also known as the Constitutionalist Army) was the army that fought against Huerta's Federal Army, the Villistas and Zapatistas during the Mexican revolution. It was formed in March 1913 by Venustiano Carranza, so-called "First-Chief" of the army. Carranza had few military forces of who he could rely on for loyalty, his leadership against Huerta gave him the theoretical support of Pancho Villa and Zapata, but they soon turned against the Constitutionalist's after Huertas defeat in 1914. Huertas Federal Army, also known as the Federales in popular culture was the force headed by Victoriano Huerta during his reign as president of Mexico between 1913 and 1914. ... General Pancho Villa José Doroteo Arango Arámbula (June 5, 1878 – July 20, 1923) — better known by his nom de guerre Francisco Villa or, in its diminutive form, Pancho Villa — was one of the foremost generals of the Mexican Revolution. ... Zapatistas can refer to two different political movements in Mexico: During the Mexican Revolution, the Zapatistas were a fighting force based in Morelos, led by Emiliano Zapata. ... Venustiano Carranza Garza (29 December 1859 - 21 May 1920) was one of the leaders of the Mexican Revolution. ... General Pancho Villa // Overview José Doroteo Arango Arámbula (June 5, 1878 (date disputed) – July 20, 1923) — better known by his nom de guerre Francisco Villa or, in its diminutive form, Pancho Villa — was one of the foremost leaders and best known generals of the Mexican Revolution, between 1911 and... For the U.S town of Zapata, see Zapata, Texas. ...

In July 1913 Carranza divided the country into seven theoretcial areas of military operations. Each area was, at least in theory, the responsability of a general commanding an Army corps. These Corps were: Northeast, Northwest, Central, East, West, South and Southeast. But the last 4 actualy existed only on paper. In reality the Consitiutionalist army was made up of 3 formations, the Northwest Corps (renamed the Army of Operations) under Alvaro Obregon, the Northeast Corps under Pablo Gonzalez and the Central Corps under Panfilo Natera. General lvaro Obreg n Salido (February 19, 1880 – July 17, 1928) was President of Mexico from 1920 to 1924. ...

When fighting broke out in 1914 between the Constitutionalists (Carranza, Obregon etc) and the Conventionalists (Villa and Zapata) the Constitutional Army numbered 57,000 men, to Villa and Zapata's 72,000 men. But as the Constitutionalists grew stronger, Villa and Zapata grew weaker.

Eventualy the war against the Conventionalists was won after the assasination of Zapata in 1919 and the surrender of Villa in July 1920. But by 1917 the main fighting of the civil war between the two factions was over, with some minor revolts by Felicistas (supporters of Felix Diaz, nephew of former President Diaz). This marked the end of any real resistance to Carranza. But when Carranza's autocartic ruled was threatened, the threat would come from the Constitutionalist army he set up. Carranza was assasinated after he tried to have Obregon arrested on false charges (Obregon was put up for election for president, which threatened Carranza and his choice of successor, Ignacio Bonillas) and Obregon marched on Mexico city with his army. Carranza was killed on the 21st of May 1920. Felicistas were the supporters of Felix Diaz, nephew of former president Porfirio Diaz, who opposed the Madero and Carranza governments in rebellions between 1913 and 1920. ... Felix Diaz is a American right-handed Major League starting pitcher in baseball, currently with the Chicago White Sox. ... Ignacio Bonillas was a Mexico diplomat. ...

In 1920 Obregon was elected president, and some other former Constitutionalist generals would eventualy become presidents and leading politicians in the years ahead.