The confederal militias were a movement of people's militia organized during the Spanish Civil War by the dominant organizations of anarchism in Spain: the National Confederation of Labor (CNT) and the Iberian Anarchist Federation (FAI).

Ricardo Sanz García (1898–1986) was a Valencian anarchist militant. A member of Buenaventura Durruti's insurgent group Los Solidarios, Sanz participated in the anarchist armed struggle against the Spanish monarchy and the dictatorship of Primo de Rivera. Following the proclamation of the Second Spanish Republic, he became a leader of the Confederación Nacional del Trabajo (CNT) and Federación Anarquista Ibérica (FAI) in Catalonia. During the Spanish Civil War, Sanz oversaw the training of the confederal militias and went on to lead the Durruti Column following the death of its namesake. In command of the Aragon front, he attempted multiple unsuccessful offensives against Zaragoza, but was either hampered by severe weather or held back by the Ministry of Defence. After the militarisation of the Column, he continued to command it as the reorganised 26th Division, but came into conflict with Communist-aligned commanders of the Spanish Republican Army. After the Nationalist victory in the Aragon Offensive, Sanz fled to France, where he remained for the rest of his life.