While at Da Nang, Major Gray detached a small group of radiomen to Monkey Mountain, a rocky, jungle-covered peninsula that jutted into the South China Sea just northeast of the city. There in relative comfort and safety, the technicians conducted equipment tests for two weeks. Several changes in the leadership and composition of the advisory team took place during this interval. Captain Raymond A. Becker, a communications officer from the 1st Radio Company, FMFPac, relieved Major Gray as the commander of the unit on 13 August. Soon thereafter a reinforced infantry company, Company K, 3d Battalion, 3d Marines, commanded by Captain William R. Irwin, replaced Lieutenant Otlowski and the Company G Marines as the advisory team’s security element. Under Captain Becker’s command, Advisory Team One redeployed, this time to Dong Bach Ma, a 3,500-foot mountain located roughly 25 miles west-northwest of Da Nang. An abandoned French resort, still untouched by the war, sprawled across the higher elevations of Bach Ma and a hard surface road curved up its steep northern face from Route 1. Using this road ARVN trucks moved Captain Irwin and the infantry element to the newly selected site in advance of the radio personnel. Once atop the mountain, Irwin had his men establish a perimeter around an abandoned monastery. This accomplished, Marines cleared a small helicopter landing zone near the old but well-preserved religious building which was to serve as their base of operations. On 19 August Marine helicopters lifted Captain Becker, his communicators, and some 4,000 pounds of equipment to the site from Da Nang. Advisory Team One, relying heavily on Marine helicopters for logistical support, operated without incident from the quaint old monastery until the second week of September. The composite unit completed its operations at Bach Ma on the 10th whereupon it returned to Da Nang. Within days the detachment was disbanded without fanfare. The radio experts returned to their parent commands in Hawaii and Washington while Company K was airlifted to Okinawa where it rejoined the 3d Battalion, 3d Marines. The quiet dissolution of the Marine Detachment, Advisory Team One, ended the first brief and little publicized chapter of Marine ground unit operations in the Republic of Vietnam.