Columna Durruti
The 26th Division was established on 28 April 1937 in Bujaraloz with former anarchist militiamen and corresponded to the 1st, 2nd and 3rd regiments of the Durruti Division, the successor of the Durruti Column after the column's militarization in January 1937. It was placed under the 11th Army Corps "(XI Cuerpo de Ejército)". The command of the unit was entrusted to Ricardo Sanz García who had been the commander of the Durruti Column after Buenaventura Durruti's death and who would be the division's only leader.