 Complete the following phrase:  On 10 October 1980, five left-wing groups, the Farabundo Martí Peoples Forces of Liberation FPL, Communist Party of El Salvador PCES, National Resistance RN, Peoples 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 