 He opposed the spread of such tendencies in the Confederación Nacional del Trabajo (CNT), at the time the largest labour union and main Anarchist organization in Spain.The CNT was prominent in combating the coup d'état by General Francisco Franco that led to the Spanish Civil War in 1936.It was at that time, shortly before his death, that Orobón wrote the words of "To The Barricades", to the tune of "Warszawianka 1905 roku" - itself a well-known Polish revolutionary song.