On 10 October 1980, five left-wing groups, the Farabundo Martí People's Forces of Liberation (FPL), Communist Party of El Salvador (PCES), National Resistance (RN), People's Revolutionary Army (ERP), and the Revolutionary Party of the Central American Workers – El Salvador (PRTC), joined forces and formed the Farabundo Martí National Liberation Front (FMLN) guerrilla coalition. The group was named after Farabundo Martí, a leader of the Communist Party of El Salvador who was executed during "La Matanza", the 1932 massacre of 10,000 to 40,000 indigenous and communist peasants in western El Salvador following a failed uprising against military President Maximiliano Hernández Martínez.