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Operation Dewey Canyon was the last major offensive by the 3rd Marine Division during the Vietnam War. It took place from 22 January through 18 March 1969 and involved a sweep of the People's Army of Vietnam (PAVN)–dominated A Shau and Song Đa Krông Valleys by the 9th Marine Regiment. Based on intelligence and captured documents, the PAVN ...
From January–March 1969 Vandegrift was used to support Operation Dewey Canyon, an offensive into the A Shau Valley south of the base.. On 9 April 1969 a Marine Sikorsky CH-53A Sea Stallion helicopter (BuNo 153738) of HMH-462 crashed into the logistics support area at Vandegrift triggering a large fire.
The U.S. portion of the operation was to bear the title Dewey Canyon II, named for Operation Dewey Canyon conducted by U.S. Marines in the northwestern South Vietnam in 1969. It was hoped that the reference to the previous operation would confuse Hanoi as to the actual target of the proposed incursion.
Operation Dewey Canyon II [3] 1st Brigade, 5th Infantry Division , 101st Airborne Division and 2nd Squadron, 17th Cavalry Regiment operation to support the ARVN Operation Lam Son 719 effort to open Route 9 through Khe Sanh to the Laotian border and to reestablish Khe Sanh as a major combat support base
The U.S. 3rd Marine Division launched Operation Dewey Canyon to attack People's Army of Vietnam (PAVN) base areas in the A Shau and Song Đa Krông Valleys of Quảng Trị Province. The operation results in 1,617 PAVN killed while 130 Marines were killed. [6]: 50 29-30 January
In Operation Dewey Canyon for example, US after-action reports claim some 1,617 PAVN killed, for a loss of 121 Marines killed and the capture of hundreds of tons of munitions, equipment and supplies. [39] Workhorse of heavy lift and firebase construction- the Boeing CH-47 Chinook. Against ARVN opponents, PAVN had greater success.
From January 22 to March 18, 1969, 2/9 participated in Operation Dewey Canyon which was a sweep of the A Shau Valley and the last major offensive by the Marine Corps in Vietnam. [7] 2/9 Marines wait to board USS Paul Revere. On August 1, 1969, 2/9 departed Vietnam onboard the USS Paul Revere bound for Camp Schwab, Okinawa.
Operation Dewey Canyon [1] [5]: 33–51 1st Battalion, 9th Marines, 2nd Battalion, 9th Marines, 3rd Battalion, 9th Marines, 2nd Battalion, 3rd Marines and ARVN 2nd Regiment offensive against PAVN communication lines in Laos: north of the A Shau Valley in Thừa Thiên Province: 1,667: 130 USMC Jan 24 – Feb 28: Operation Ohio Rapids [1]