Fruit of a split of the Galician People's Union, which occurred in 1977 when Xosé Luís Méndez Ferrín, who accused the UPG of rightism, gradual compliance of the Spanish institutions and interclasism, was expelled from the organization due to their discrepancies in the policy union, his opposition to the legalization of the ING, on the participation in the elections and also for his support to the armed struggle.
Froito dunha escisión da Unión do Povo Galego ocorrida en 1977 cando Xosé Luís Méndez Ferrín, que acusaba á UPG de dereitización, progresivo acatamento das institucións españolas e interclasismo foi expulsado da organización por discrepancias na política sindical, oposición á legalización da ING, sobre a participación nas eleccións e tamén polo seu apoio á loita armada.