A month later, it took part in the failed Battle of Albarracín,[n. 1] the 81st lead a rout, having to be disarmed by the 24th Division that had come to relieve it.

[7] On December 30, nationalists attacked the positions manned by the 16th Mixed Brigade, which fell back and dragged the 81st MB into its withdrawal.

After being subjected to a reorganization by its new boss - Elisardo Martínez Sánchez - the unit took part in the capture of Teruel.

2] The unit remained deployed in Catalunya until May 17, 1938, when it was transported by boat to the coastal sector of Castellón de la Plana —as the republican zone had been cut in two in mid-April.

[9] The unit remained on this front during the rest of the war, without actually taking part in relevant military operations.