Sub-Lieutenants Mosquera-Gutierrez and Pérez-Grandi had been wounded in the British bombardment, and the remnants of their platoons were put under the command of Captain Carlos López Patterson, the Operations Officer of the 4th Regiment, who took up blocking positions in the ground between Mount Tumbledown and Wireless Ridge alongside the dismounted 10th Armoured Cavalry Reconnaissance Squadron under Captain Rodrigo Alejandro Soloaga, engaging at times with heavy machine gun and mortar fire the forward 3 PARA elements on Mount Longdon throughout the daylight hours of 12 and 13 June.