 After the resignation of Sigfredo Hillers in the 1980s and change most of the members and cadres of the organization left to join FE-JONS, and the organization was almost considered extinct.But, due to the persistence of a few veterans of the FES, the party was able to survive.FEI gained notoriety again in 1999, when, after an internal crisis in FE-JONS, many members joined the party.