The workings of the control organization of the Brigade air-ground team in the Pusan Perimeter have been described as follows in the survey of the Marine Corps Board Study: “Battalion TACP’s made requests for air support missions direct by TAR net to the Air Support Section. The regimental TACP and Brigade Air Section monitored this net. The Brigade control agency having received a request for a mission, contacted the TAC and the Flight Leader (FL) of the aircraft orbiting on station awaiting a mission. The TAC and the FL were then directed to the vicinity of the TACP from whom the request had originated. “The TACP controlled the execution of the mission in accordance with the wishes of the battalion commander. The TACP gave the location of the target to the TAC. The latter designated the target to the FL and his flight of supporting aircraft. The unit being supported marked its front lines. The TAC directed the attacking aircraft in making attacks on the target. His directions related to the technique of attacking specific targets with aircraft. Control of the attack was exercised by the ground unit being supported. “In many instances the TAC or the TAO would locate targets not yet located by ground units. This was often done in response to a request from ground units. Both the TAC and TAO located targets beyond the vision of ground units, and both were capable of, and did, designate these targets to flights of supporting aircraft and directed attacks on such targets, when requested to do so by ground units. Conditions favored delegating control to forward TACP’s beyond convenient VHF range between them and the Brigade (Air Support Section). Brigade attack formations frequently consisted of battalions in column. The forward battalion was free to employ air support at a moment’s notice.” This was the situation on the afternoon of 11 August 1950 as the 3d Battalion of the 5th Marines attacked toward Sachon, followed by 2/5 in trace. Overhead a flight of VMF-323 Corsairs orbited on station, and OY observers reported the enemy to be pulling back rapidly toward Sachon. How Company led the Marine attack, with lead tanks employing reconnaissance by fire. At 1800, after the column had covered several miles, a lone enemy machinegun in a valley on the left held up the advance by wounding three Marines. By the time the tanks silenced the weapon with .50-caliber fire, it was decided to halt. Taplett deployed his battalion on two hills north of the road, and the infantrymen settled down for a quiet night. The gravel crunchers could thank air and other supporting arms for an impressive demonstration of power that day. There was even the suggestion of an amphibious operation in the Brigade advance, for an LST followed the column and anchored near the fishing village of Tanghong-ni after the securing of Kosong.