It emerged in late 1971, founded by splinters of the Communist Party of Colombia (Marxist–Leninist) (PCC(ML)) in Antioquia, Nariño, Santander and the Atlantic Coast.
Liga ML was active in peasant movements.
In 1977 Liga ML took part in the Committee for Unity, together with other revolutionary forces.
In 1982 it merged into the New Revolutionary Unification Movement - Marxist-Leninist.
This article about a Colombian political party is a stub.