PCB (ML) emerged as a pro-People's Republic of China splinter group of the Communist Party of Bolivia in 1965.
PCB (ML) was led by Óscar Zamora Medinaceli.
In subsequent elections FRI was a candidate in alliances with MNR, MIR and ADN.
The central press organ of PCB (ML) was Liberación.
Today, PCB (ML) no longer exists although FRI has continued.