a claim not entirely unsupported by facts. Others, however, laid more of the blame on the operational ineptitude of SOG, which simply continued to repeat a failed formula. Changes to the infiltration program (in the form of the diversionary Operation Forae), spurred by suspicions at headquarters, came only in 1967. The security apparatus of North Vietnam had decades in which to learn to cope with not only the CIA's program, but with the unconventional and covert operations of its French predecessors. The CIA had been loath to conduct such operations in the north, since similar operations in the Soviet Union, Eastern Europe, and the PRC had been abject failures and North Vietnam was considered an even tougher target to penetrate. North Vietnamese security forces simply captured a team, turned its radio operator, and continued to broadcast as though nothing had happened. Supplies and reinforcements were requested, parachuted in to the requesting team's location, and were likewise captured. During the period 1960–1968 both the CIA and MACV-SOG dispatched 456 South Vietnamese agents to their deaths or long incarcerations in northern prisons. Hanoi continued this process year after year, learning SOG's operational methods and bending them to its purpose. In the end, it was running one of the most successful counterintelligence operations of the post-Second World War period. On the night of 22–23 August as part of the Phase III Offensive a company from the VC R20 Battalion and a sapper platoon infiltrated MACV-SOG's Forward Operating Base 4, a compound just south of Marble Mountain Air Facility, killing 17 Special Forces soldiers (their largest one-day loss of the war) and wounding another 125 Allied troops. Thirty-two VC were killed. Commando Hunt With the deflation of its northern operations (although the JCS demanded that SOG retain the capability of reinitiating them), SOG concentrated its efforts on supporting Commando Hunt, the Seventh/Thirteenth Air Force's anti-infiltration campaign in Laos. By 1969 the Ground Studies Group was running its operations from C&Cs at Da Nang for operations in southeastern Laos and at Ban Me Thuot for its Cambodian operations. That year they were joined by a new C&C at Kontum, for operations launched into the triborder region of the Prairie Fire and the northern area of Daniel Boone, which was renamed Salem House that year. Each of the C&Cs was now fielding battalion-size forces, and the number of missions rose proportionately. Command and Control North (CCN)