The Guards decided to fall back towards the south but entered a minefield and were caught in a crossfire from the Mortar Platoon under Sergeant Elbio Cuñe on Mount William and the Marines' artillery. BIM-5 coordinated fire support from "Bravo" Battery of the 1st Marine Field Artillery Battalion (B/BIAC) and also guns of the Argentine Army's 3rd and 4th (Airborne) Artillery Groups (G.A.3/G.A.Aerot.4). The Guards sustained twelve casualties. At about 1.30 a.m. on 14 June, the commander of the 5th Marines ordered O Company of the Marines, to withdraw in order to stand in reserve. O Coy's rest in reserve was short lived and in the early hours of 14 June the platoon commanders were instructed to put the platoons on one hour's notice to move.