Shortly after its creation, the 14th Division faced the Battle of Guadalajara. With the support of the other republican divisions, the enemy attack was stopped. On March 18, the Mera Division, operating on the right flank of the republican front, and the 11th Division of Enrique Lister, with the support of 70 Soviet T-26 tanks, launched an attack and seized the town of Brihuega; the nationalist forces fled in disarray, leaving behind prisoners and war equipment. By the end of March the front stabilized after the Republicans managed to recover a large part of the territory.