Columna Durruti
The group was formed from a current of workers that defined themselves against the collaboration of the CNT with the government, and "milicianos" who returned to Barcelona to fight against the militarization of the militias. Thus, most of the members of the new group were former members of the Fourth Group of the Durruti Column, at the head of which Pablo Ruiz, Progreso Ródenas and Eduardo Cerveró had been, among others.