All the content is from the Liberation Army of the South, which was known simply as the Zapatista Army. This army, led by Emiliano Zapata, was one of the most relentless and radical armies that has existed in Mexico. It was mainly composed by poor farmers who joined the cause with the promise of land to farm.

The archive consists of correspondence exchanged between Jesús Gutiérrez Cázares and other Zapatista commanders, some during the siege of Mexico City.
Jesús Gutiérrez Cázares was a general of the Zapatista brigade of the Tlaltenango headquarters. (See in the Dictionary of the Generals of the Revolution. Secretary of Public Education, 2013)

The archive contains:

– Seven handwritten letters, with the seal of the “Cázares Brigade, General Headquarters”, three signed by Jesús Gutiérrez Cázares, a Zapatista commander.
– A letter with the seal of the “Libertador del Sur Army, Velasco Rus Brigade”, signed by Luis Velasco Rus.
– Two handwritten letters from the “Pacheco” Division.
– A letter with the seal of the “Ejército Libertador Convencionalista. Brigada Defensores de la Patria” (Army of the Liberation of the Convention, Brigade Defenders of the Fatherland).
– Three letters with the seal of the “Libertador del Sur Army, Division of the Brigade Fuentes”, signed by Ignacio Fuentes, Eulalio González and Florencio Granda.
– A typed letter, with the seal of the “Liberation Army, Division of the Solís Brigade”, signed by Luciano Solís.

The archive letters talk about all kinds of curious and interesting stuff of the everyday of the Zapatist army such as:
-An order for the soldiers to stop cutting sugar cane, because they are affecting the peasants, and the soldiers aren´t doing this for necessity, but just for stealing.
-A report of enemy movements in the “Desierto de Los Leones”
-A report about new recruits joining the Army
-Information of officials about their current situation
-Information about the findings of scouting at the frontlines
-One is a request for some soldiers to be punished that robbed a Pulqueria and even took some weapons from the people of the town.
-A report of accusations against robberies committed by the soldiers in at a ranch