 In 1975, Lil Milagro, together with Costa Rican Eduardo Sancho (a.k.a.Fermán Cienfuegos) and other fellow guerrilla fighters, decides to abandon the ERP and found a new political movement called Resistencia Nacional (RN).This separation was due to several ideologically-motivated clashes within the ERP that resulted in the execution of the revolutionary leader and poet Roque Dalton and Armando Arteaga, both in the hands of the ERP's high command.