On 3 February it attacked the rebel positions in Villaverde Bajo, but it went back to the capital in order to take part in the Battle of Jarama. On 8 February it was near Vaciamadrid where on 19 February it began an assault at El Pingarrón hill; there it occupied the enemy trenches on four occasions, being finally repulsed in all attacks. During the Jarama combats many officers —including all battalion commanders— as well as a great number of soldiers were killed and the unit had to be reconstituted in the rearguard.