On June 18, 1966, the 1/5th(M) conducted a one day search and destroy operation in the Filhol. At 1030 hours one Recon track hit an AT mine and had to be towed. Company A started receiving sniper fire and then mortar fire at 1145 hours on the southern edge of the Plantation. 2 APCs were hit by RPG-2 rounds. Company A located a bunker and tunnel system vic XT 682166 at 1215 hours. They spent the rest of the afternoon neutralizing the area and searching and destroying the bunker and tunnel system. Company C conducted a search and destroy operation in the center and west end of the Filhol. They deposited a stay behind ambush at XT 675200. Company A left an ambush at XT 679167. Numerous mines and booby traps were located and destroyed during the day. All elements except the two ambushes closed base camp by 1835 hours. During the operation Company A suffered 3 KIAs and 14 WIAs, 2 of whom were treated and returned to duty.