"The Years immediately following the War to End All Wars were a time of mass upheaval. Most predominantly, Russia was plunged into a civil war after 1917's October Revolution. While the Red and White factions geared up for war, another revolution was occurring half a world away.
Already in the midst of a chaotic revolution against corrupt governance, Mexico had yet to find a single unifying leader. Several charismatic figures had arisen since the revolution's beginning in 1910. Eight years after the nation descended into chaos, one of those leaders took inspiration from the events in Russia.
Emiliano Zapata was already a leader of a growing army of guerillas in southern Mexico. With the reported success of the Russian revolution, Zapata became inspired to extend his aims to the economic, political, and social liberation of all working class Mexicans. The battle cry of Tierra y Libertad was joined by a call to revolution against not only domestic corruption, but also from the chains of foreign capitalist interests.
After long negotiations he was joined by another famous revolutionary, Francisco I. 'Pancho' Villa. Their forces joined, with Russian encouragement, to form a Mexican People's Front for Liberation. Years of bitter fighting from 1919-22 ended with the defeat of western supported reactionary forces. Finally, peace had returned to central America's largest nation.
In the aftermath of war the victors formed officially into the Mexican Communist Party, or Partido Communista Mexicano (PCM). Tragedy struck as Villa was assasinated in Mexico City just before the first national party congress elections. His death was blamed on reactionary elements supported by the bougeois west, particularly the United States. Rumors of inter-party disagreements between Villa and Zapata gave fuel to conspiracy theories, but were denied categorically by the PCM.
On May 5, 1923 - the anniversary of the Battle of Juarez - Emiliano Zapata was unanimously elected Chairman of the PCM, head of state of the new Mexico. Officially his title included President as well. Zapata's years in power from 1923-30 were characterized by a focus on agrarian land reform, solidification of the proletariat's power structure, and modernization efforts.
They were the first years of a new era for Mexico. This was the era of the Mexican Socialist Republic." - from 'A Breif History of Socialism in the New World'
Emiliano Zapata, Chairman of the Mexican Communist Party (1923-30).