[1] The party has a trade union wing, Frente Obrero (FO, Workers' Front) that was founded in 1974.

The wing organized Milicias Populares Antisomocistas (MILPAS), which fought against the dictatorship of the Somoza regime.

As of 1980, MAP-ML had only about 25 members, but through FO and El Pueblo, the daily newspaper of the party, it exerted much influence in the society.

MAP-ML built up a militant trade union activism and in urban areas had its own armed militias, Milicias Populares Antisomocistas (MILPAS).

MAP-ML opposed the Esquipulas Peace Agreement, which it saw as an imperialist scheme by the United States.

In the 1990 presidential election, the PMLN candidates (Isidro Téllez for president, Carlos Cuadra for vice-president) got 8,135 votes (0.6%).