The Popular Movement for National Liberation (Spanish

Spanish language

Spanish , also known as Castilian , is a Romance language in the Ibero-Romance group that evolved from several languages and dialects in central-northern Iberia around the 9th century and gradually spread with the expansion of the Kingdom of Castile into central and southern Iberia during the...

: Movimiento Popular de Liberación Nacional, MPLN) was a left-wing political party

Political party

A political party is a political organization that typically seeks to influence government policy, usually by nominating their own candidates and trying to seat them in political office. Parties participate in electoral campaigns, educational outreach or protest actions...

 in Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

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In 1972, Ramiro Velasco Romero split from the Revolutionary Left Movement

Revolutionary Left Movement (Bolivia)

The Revolutionary Left Movement - New Majority is a social democratic political party in Bolivia...

 and founded the Popular Movement for National Liberation.
In 1978, 1979, and 1980 the MPLN took part in an electoral coalition Democratic and Popular Union backing Hernán Siles Zuazo

Hernán Siles Zuazo

Hernán Siles Zuazo was a politician from Bolivia. He served as his country's constitutionally elected president twice, from 1956 to 1960 and again from 1982 to 1985....

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In 1983, the Popular Movement for National Liberation merged with the Socialist Party-One

Socialist Party (Bolivia, 1971)

The Socialist Party was a left-wing political party in Bolivia.This Socialist Party was established on 1 May 1971 by the merger of three small parties supporting the former military Co-President and the President General Alfredo...

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The Socialist Party-One presented Ramiro Velasco Romero as its presidential candidate in 1985 and 1993.