Texas Tech University

Dewey Canyon II (In support of LAM SON 719)

Operation
Title
Dewey Canyon II (In support of LAM SON 719)
Start Date
1/30/1971
End Date
3/6/1971
CTZ
I
TAO
Quang Tri Province, Khe Sanh and the A Shau Valley
Objective
To back up the ARVN attack into Laos in LAM SON 719.
Description
This operation was in support of LAM SON 719. Because the U.S. was not allowed to enter Laos with the ARVN during LAM SON 719, they conducted airmobile and aviation operations as well as tactical air and B-52 bomber support. At the beginning of operation DEWEY CANYON II, the 1st Brigade, 5th Infantry traveled down Route 9 to Khe Sanh. The road was secure 5 February. At the same time, the 101st Airborne feinted into A Shau Valley to distract the PAVN. Once the attack into Laos commenced, U.S. helicopters of the 2/17th Cavalry attacked weapons sites and troops columns and secured landing sites. Also, the U.S. provided logistical support and aritillery fire from Khe Sanh and the surrounding areas in South Vietnam. The U.S. helicopters even inserted ARVN divisions into Laos. Weather and antiaircraft fire hindered U.S. aid. Technically, DEWEY CANYON II concluded 7 February. However, U.S. involvement continued until the ARVN troops withdrew from Laos.
Allied Units Involved
Unit
1st Brigade, 5th Infantry
Branch
United States Army
Branch Abbrv.
USA
Unit
101st Airborne Division (airmobile, USA)
Unit
2/17th Cavalry
Branch
United States Army
Branch Abbrv.
USA
Allied Oper. Strength
20,000 ARVN and 9,000 US
Enemy Units Involved
Unit
People's Army of Viet Nam
Branch Abbrv.
PAVN
Sources
Author
Shelby L. Stanton
Title
Vietnam: Order Of Battle
Author
Spencer C. Tucker
Title
The Encyclopedia Of The Vietnam War: A Political, Social & Military History
Author
Harry G. Summers, Jr.
Title
Historical Atlas Of The Vietnam War
Author
National Archives and Records Administration
Title
Preliminary Checklist Of United States Military Operations In Southeast Asia