Robertson, Mark John, WO1

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Last Rank
Warrant Officer 1
Last Service Branch
Warrant Officer (pre-2004)
Last Primary MOS
100B-Utility/Observation Helicopter Pilot
Last MOS Group
Aviation (Officer)
Primary Unit
1970-1971, 100B, 2nd Squadron, 17th Cavalry Regiment/B Troop
Service Years
1969 - 1971

Warrant Officer (pre-2004)

Warrant Officer 1

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Year of Birth
This Military Service Page was created/owned by CW2 Phillip M. Kemp (Mike) to remember Robertson, Mark John, WO1.

If you knew or served with this Soldier and have additional information or photos to support this Page, please leave a message for the Page Administrator(s) HERE.
Casualty Info
Home Town
Last Address

Casualty Date
Feb 10, 1971
Hostile, Died while Missing
Air Loss, Crash - Land
Thua Thien (Vietnam)
Vietnam War
Location of Interment
Arlington National Cemetery - Arlington, Virginia
Wall/Plot Coordinates
05W 094

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 Unit Assignments
Aviation Warrant Officer Rotary Wing Course101st Airborne Division 2nd Squadron, 17th Cavalry Regiment2nd Squadron, 17th Cavalry Regiment
  1969-1969, Aviation Warrant Officer Rotary Wing Course
  1970-1970, Aviation Warrant Officer Rotary Wing Course
  1970-1971, 100B, 101st Airborne Division
  1970-1971, 2nd Squadron, 17th Cavalry Regiment
  1970-1971, 100B, 2nd Squadron, 17th Cavalry Regiment
  1970-1971, 100B, 2nd Squadron, 17th Cavalry Regiment/B Troop
 Combat and Non-Combat Operations
  1970-1971 Vietnam War/Counteroffensive Phase VII Campaign (1970-71)
 Other News, Events and Photographs
  Dec 19, 2006, Burial Site
  Jun 22, 2012, General Photos
 Additional Information
Last Known Activity

Declared dead on 04/08/1971.

Flight class: 70-25/70-21

Short Summary: Hit by .51 cal burst into flames, fell vertically, & exploded while on a recon mission.

Aircraft: OH-6A tail number 66-17765

Call sign: Red Oak 17

Primary cause: SVN-BNR

Compliment cause: small arms fire

Started Tour: 09/16/1970

Military grid coordinates of event: YD257076

single male U.S. citizen
Race: Caucasian
Religion: Roman Catholic

This record was last updated on 08/20/1995

Information on U.S. Army helicopter OH-6A tail number 66-17765

Total flight hours at this point: 00001181
Date: 02/10/1971 MIA-POW file reference number: 1701
Incident number: 71021018.KIA
This was a Combat incident. This helicopter was LOSS TO INVENTORY
This was a Recon mission for Unarmed Recon
While in Operations Area this helicopter was in Orbit at 0250 feet and 085 knots.
UTM grid coordinates: YD257076
Helicopter took 4 hits from:
Small Arms/Automatic Weapons; Gun launched non-explosive ballistic projectiles less than 20 mm in size. (12.7MM)
Systems damaged were: PERSONNEL
The helicopter Crashed. Aircraft Destroyed.
Both mission and flight capability were terminated.
Original source(s) and document(s) from which the incident was created or updated:
Defense Intelligence Agency Reference Notes.
Defense Intelligence Agency Helicopter Loss database.
Survivability/Vulnerability Information Analysis Center Helicopter database.
Also: 1701, LNNF, HUGHS, OPREP (Lindenmuth New Format Data Base. )

Crew Members:


REFNO Synopsis:

WO Mark J. Robertson, pilot, and Sgt. Joseph R. Pietrzak, observer, were flying aboard an OH6A helicopter on a visual reconnaissance mission in Thua Thien Province, South Vietnam on February 10, 1972. The helicopter was hit by heavy 51 caliber machine gun fire in the power compartment and fuel section. It burst into flames and fell vertically and exploded on impact. Other helicopters in the area immediately attempted to land and search the area for survivors, but the crewmen reported that enemy fire and deteriorating weather conditions prevented them from doing so. None of the crews conducting visual searches saw survivors or bodies around the blazing helicopter. Radio frequencies were monitored for a period after that, with no result. Enemy activity in the area prevented further search in the loss area near the Laos border.

This record was last updated on 05/25/1998 

Additional information is available on CD-ROM.

Please send additions or corrections to: The VHPA Webmaster Gary Roush.

Date posted on this site: 07/20/2010

Copyright © 1998 - 2010 Vietnam Helicopter Pilots Association




United States Army Warrant Officer. He piloted a OH6A helicopter on a visual reconnaissance mission when the helicopter was hit by heavy machine gun fire in Thua Thien Province, South Vietnam. He was classified as Killed in Action from the crash. Sgt Joseph R Pietrzak was also aboard the helicopter and his remains were repatriated in 1994.

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