Although such a reaction is not uncommon among untried troops, this realization was no balm to a wrathful Brigade commander at dawn on 4 August. Craig called in leaders of the most obvious offenders and severely reprimanded them. He made it known in no uncertain terms that such conduct would not be tolerated again; and from that time on, every man in the Brigade took him at his word. The remainder of the stay at Changwon was relatively calm. On one occasion a group of seven unidentified persons was spotted atop a mountain overlooking the Brigade area. Closer scrutiny disclosed that the individuals had radios and were carefully observing all activity within the Marine perimeter. A platoon of infantry was dispatched to destroy what was apparently an enemy observation post; but by the time the rifleman scaled the height, both intruders and radios had disappeared. The climb caused a number of heat prostration cases within the platoon, for Korean terrain and heat were giving Marines their first bitter taste of a crippling combination. Brigade helicopters, flown to Pusan on 2 August, set a combat precedent by delivering rations and water to the infantrymen on the mountain, and by evacuating the more severe heat casualties.[153] [153] Brig SAR, basic rpt. While Craig’s ground force spent its time patrolling and training around Changwon, VMO-6 and the Air Support Section (MTACS-2) were readying themselves. Accompanying the 4 HO3S helicopters in the flight to Pusan from Japan on 2 August were 4 of VMO-6’s OY-2 observation planes. The other 4 light aircraft remained in Japan, to be used as spares. On 4 August the LST which had been dispatched by Cushman and Weir also arrived at the South Korean port. While two helicopters flew to Changwon to operate from Craig’s CP, the others, together with the rest of VMO-6 and the Air Support Section, moved to the airfield at Chinhae. By 5 August, MTACS-2 had established communications with the _Sicily_ and _Badoeng Strait_ and was ready for business. _The Pusan Perimeter_ The big picture, militarily speaking, was outlined in somber colors during the first few days of August 1950. Only the southeast corner of Korea was left to the Eighth Army and its battered ROK allies. Space had been traded for time until there remained in effect merely a UN beachhead about 90 miles long and 60 wide. Unremitting enemy pressure throughout July had pushed the UN forces back to positions stretching raggedly from Pohang-dong on the east coast to Masan on the south coast by way of Taegu in the center. The logistical lifeline extended from Pusan to Taegu both by road and rail, and some 300,000 tons of supplies were moved in July by the Pusan Logistical Command.