The unit was created in March 1937 in the Almagro area, from the recruits of 1936. The 113th Mixed Brigade was assigned to the 36th Division of VII Army Corps,[1] with the idea of its participation in the plan P. The operation, however, was not carried out and instead the brigade was sent to the Toledo front, at the beginning of May, to plug the rupture of that sector due to a nationalist attack. During the rest of the conflict, it did not intervene in any other operation.[2]