Publish Date 
Written by ENGEN, ROBERT JOSEPH
REMAINS IDNETIIFIED 30 OCT 91
Name: Robert Joseph Engen
Rank/Branch: E4/US Army
Unit: 507th Transportation Detachment, 2nd Squadron
Date of Birth: 03 April 1951 (Grand Forks ND)
Home City of Record: Stockton CA
Date of Loss: 18 February 1971
Country of Loss: Laos
Loss Coordinates: 163910N 1062226E (XD465415)
Status (in 1973): Killed/Body Not Recovered
Category: 2
Aircraft/Vehicle/Ground: OH6A
Refno: 1705
Other Personnel in Incident: Gregory S. Crandall; Walter E. Lewellen (both missing)
LAM SON 719 was a large offensive operation against NVA communications lines in Laos. The operation called for ARVN troops to drive west from Khe Sanh, cut the Ho Chi Minh Trail, seize Tchpone and return to Vietnam. The ARVN would provide and command the ground forces, while U.S. Army and Air Force would furnish aviation airlift and supporting firepower. The 101st Airborne Division commanded all U.S. Army aviation units in direct support of the operation. Most of the first part of the operation, which began January 30, 1971, was called Operation DEWEY CANYON II, and was conducted by U.S. ground forces in Vietnam.
On February 8, 1971, early into the operation, a U.S. Army OH6A helicopter was shot down about 8 miles east of Tchpone. This aircraft, flown by W1 Gregory Crandall, pilot, SP4 Robert J. Engen, scout/observer, and Sgt.
Walter E. Lewellen, crew chief, was conducting an aerial reconnaissance mission when Crandall radioed that he was under heavy enemy fire. As he maneuvered to evade the fire, the aircraft was seen to crash and catch on
fire. There was one major and six secondary explosions. About March 7, an ARVN unit spotted the wreckage, but was unable to reach it to thoroughly investigate. It was never learned for certain that the crew perished.
Losses were heavy in Lam Son 719. The ARVN lost almost 50% of their force. U.S. aviation units lost 168 helicopters; another 618 were damaged. Fifty-five aircrewmen were killed, 178 wounded, and 34 missing in action in the entire operation, lasting until April 6, 1971.
In all, nearly 600 Americans were lost in Laos, but because we did not negotiate with the Pathet Lao, no Americans held in Laos were released. Since that time, over 10,000 reports have been received relating to Americans prisoner, missing or unaccounted for in Southeast Asia. Although many authorities are convinced that hundreds remain alive, the U.S. has not secured the release of a single man.
Full Name: ROBERT JOSEPH ENGEN
Date of Birth: 4/3/1951
Date of Casualty: 2/18/1971
Home of Record: STOCKTON, CALIFORNIA
Branch of Service: ARMY
Rank: SP4
Casualty Country: LAOS
Casualty Province: LZ
Status: MIA
Full Name: WALTER EDWARD LEWELLEN
Date of Birth: 6/3/1951
Date of Casualty: 2/18/1971
Home of Record: NEW ALBANY, INDIANA
Branch of Service: ARMY
Rank: SGT
Casualty Country: LAOS
Casualty Province: LZ
Status: MIA
Michael Robert Patterson was born in Arlington and is the son of a former officer of the US Army. So it was no wonder that sooner or later his interests drew him to American history and especially to American military history. Many of his articles can be found on renowned portals like the New York Times, Washingtonpost or Wikipedia.
Reviewed by: Michael Howard