The revolutionary leftist Zapatista Army of National Liberation initiated twelve days of armed conflict in the Mexican state of Chiapas.

Far-left politics are politics further to the left on the political spectrum than the standard political left. The term encompasses a variety of ideologies, from socialism to anarchism. In certain instances—especially in the news media—far left has been associated with some forms of authoritarianism, anarchism, communism, and Marxism, or are characterized as groups that advocate for revolutionary socialism and related communist ideologies, or anti-capitalism and anti-globalization. Far-left terrorism consists of extremist, militant, or insurgent groups that attempt to realize their ideals through political violence rather than using democratic processes.

The Zapatista Army of National Liberation, often referred to as the Zapatistas, is a far-left political and militant group that controls a substantial amount of territory in Chiapas, the southernmost state of Mexico.

Chiapas, officially the Free and Sovereign State of Chiapas, is one of the states that make up the 32 federal entities of Mexico. It comprises 124 municipalities as of September 2017 and its capital and largest city is Tuxtla Gutiérrez. Other important population centers in Chiapas include Ocosingo, Tapachula, San Cristóbal de las Casas, Comitán, and Arriaga. Chiapas is the southernmost state in Mexico, and it borders the states of Oaxaca to the west, Veracruz to the northwest, and Tabasco to the north, and the Petén, Quiché, Huehuetenango, and San Marcos departments of Guatemala to the east and southeast. Chiapas has a significant coastline on the Pacific Ocean to the southwest.