1971
For more details on on the South Vietnamese offensive into Laos, see Operation Lam Son 719.During Commando Hunt V (10 October 1970 to 30 April 1971) Air Force intelligence claimed 16,266 trucks destroyed and another 7,700 damaged during the dry season offensive. The Seventh Air Force headquarters in Saigon, chagrined by the enormity of the figures, recomputed them and lowered the estimate to 11,000 destroyed and 8,000 damaged. In fact, there were only 2,500–3,000 PAVN trucks operating on the trail during 1970–1971, each carrying approximately four tons of materiel.
77,000 combat sorties were flown during the offensive while the number of communist anti-aircraft weapons defending it reached 1,500. Although only 11 aircraft were brought down by air defense fire during the dry season, this lower level of destroyed aircraft was not the result of any U.S. countermeasures. The lower figures were attributed to the fact that many PAVN air defense units had been moved to the Tchepone area to support the counteroffensive against the South Vietnamese Operation Lam Son 719.
The interdiction effort during Commando Hunt VI (15 May through 31 October 1971) was thrown off by Lam Son 719 during April and May. During the offensive, 80 percent of all U.S. aerial sorties were directed to support it. This highlighted what was now rapidly becoming a dual dilemma for the Air Force: First, the gradual withdrawal of U.S. forces from Southeast Asia meant that there were fewer and fewer air assets available with which to conduct more and more missions. During Commando Hunt, for example, 1,777 aircraft were utilized during the campaign. By the time of the opening of Commando Hunt VI, that figure had decreased to 1,199 aircraft and this number dropped to 953 before that phase was completed; Second, this state of affairs was exacerbated by the withdrawal of sorties to conduct missions for Operation Freedom Deal in Cambodia.
During the year the North Vietnamese transported or stored 60,000 tons of supplies with a net loss rate of 2.07 percent. During the same period, 195,000 PAVN replacements moved through the system to the southern battlefields. As during the previous year, PAVN continued to expand the system. By the end of May the North Vietnamese had occupied Muong Phalane, Ban Houei Sai, and Paksong. They also retook Attopeu, Saravane, and Ban Thateng, cementing their hold on the strategic Bolovens Plateau of south central Laos. Commando Hunt VI, launched during the wet season, was hampered by heavy rain and the arrival of two typhoons which threw off both the PAVN logistical effort and U.S. attempts to interdict it.
Read more about this topic: Operation Commando Hunt