The People's Revolutionary Army (Spanish: Ejército Revolucionario del Pueblo, abbreviated ERP) was one of five leftist guerrilla organizations that comprised the Farabundo Martí National Liberation Front (FMLN).

The second group that helped create the ERP were members from the Union of Young Patriots (UJP) and the Salvadoran University Catholic Action (ACUS).

The last group that made up the ERP were activists from the Jose Celestino Labor Institute who consisted of members from the Union of Young Patriots (UJP) and the Salvadoran Communist Party (PCS).

The ERP focused on armed struggle in order to promote social justice and install a more democratic government.

The ERP wanted to be the center of the El Salvadoran revolution while gaining support from the discontented of and to cause a violent uprising or insurrection by performing military attacks.

The four groups within the FMLN consisted of the Popular Liberation Forces (FPL), the National Resistance (RN), the Revolutionary Party of Central America Workers (PRTC) and the ERP.

The importance of joining the FMLN was to be united with other groups that shared similar ideas of overthrowing the local government.

The ERP adhered to the Cuban strategy of focoism, which believed that a socialist revolution could be inspired by small insurgent groups, thanks to the social, cultural and political significance that the presence and activities of communist guerilla entailed.

Many of the organization's members and recruits were formed supporters of the Christian Democratic Party, radicalized through liberation theology.

Another attack by the ERP was the killing of Herbert Ernesto Anaya Sanabria, a leader of the Salvadoran Human Rights Commission.

An ERP member, "Jorge Alberto Miranda Arevalo," denied the killing during his trial in 1988 at the First Criminal court of San Salvador.

(UN Security...) Alvarez, ALberto M. "From Revolutionary War to Democratic Revolution: The Farabundo Marti National Liberation Front (FMLN) in El Salvador."

Lindo-Fuentes, Héctor, Erik Kristofer Ching, and Lara MartÃnez Rafael A. Remembering a Massacre in El Salvador: The Insurrection of 1932, Roque Dalton, and the Politics of Historical Memory.