Vanguard of the Revolutionary Workers' Party in 1978. It was led by FilemónEscóbarEscóbar and Ricardo Catoira Marín. The VO took part in elections in 1978
Cochabamba, where he was educated in Marxist thought by trade unionist FilemónEscóbar. He graduated as a sociologist from the Higher University of San Andrés
from the Revolutionary Workers' Party in 1975. Led by workers' leader FilemónEscóbar and Víctor Sossa. In 1978 the VCPOR took part in an electoral coalition
formation derives from the paramount labor activists of the day, namely: FilemónEscóbar [es], Juan Lechín, Víctor López [es], Edgar Ramírez [es], Simón Reyes [es]