Name: Peter Robert Bossman 
Rank/Branch: Hospital Corpsman Third Class/US Navy 
Unit: Marine Medium Helicopter Squadron 363, 
Marine Air Group 13, 
1st Marine Aircraft Wing 

Date of Birth: 03 December 1944 (Lackawanna, NY)
Home of Record: West Seneca, NY
Date of Loss: 25 September 1966 
Country of Loss: South Vietnam
Loss Coordinates: 164656N 1065421E (YD031563) 
Click coordinates to view (4) maps

Status in 1973: Killed/Body Not Recovered 
Category: 3
Aircraft/Vehicle/Ground: UH34D "Seahorse" 
Other Personnel In Incident: Phillip A. Ducat and Dean W. Reiter (missing) 


SYNOPSIS:   One of the earliest helicopters employed in Southeast Asia, and the primary Marine Corps helicopter used during the early years of the war, was the Sikorsky UH34D Seahorse.  This aircraft was already quite old when they arrived in the battle zone.  However, both the US and South Vietnamese military found them to be extremely effective throughout the war.

On 15 July 1966, Operation Hastings began as a search and destroy mission 55 miles northwest of Hue, Quang Tri Province, South Vietnam, to counter the NVA 324B Division located across the demilitarized zone (DMZ).  In September 1966, Operation Prairie, the follow up to Operation Hastings, was underway in the Ngan Valley just south of the DMZ in the same location as its predecessor.

On 25 September 1966, Capt. Phillip A. Ducat, pilot; 1st Lt. Dean W. Reiter, co-pilot; Cpl. Vernon H. Parker, Jr., crewchief; LCpl. Arthur W. Green, door gunner; and HM3 Peter R. Bossman, corpsman; comprised the crew of a UH34D Sikorsky Seahorse helicopter on a night "dust-off" medical evacuation mission.  The helicopter was to pick up Marines who had been wounded while engaged in heavy combat with enemy forces along Highway 9 in the jungle covered mountains during Operation Prairie.  Weather conditions during this mission included a very bright full moon.

Highway 9 was a primary east-west road that ran from the South Vietnamese/Lao border nearly to the coastline where it intersected Highway 1, the primary north-south road that paralleled the coastline nearly the entire length of Vietnam.  Highway 9 became a major part of the North Vietnamese infiltration route once they crossed into South Vietnam from the infamous Ho Chi Minh Trail.

When North Vietnam began to increase its military strength in South Vietnam, NVA and Viet Cong troops again intruded on neutral Laos for sanctuary, as the Viet Minh had done during the war with the French some years before.  This border road was used by the Communists to transport weapons, supplies and troops from North Vietnam into South Vietnam, and was frequently no more than a path cut through the jungle covered mountains.  US forces used all assets available to them to stop this flow of men and supplies from moving south into the war zone.

Capt. Ducat was heard over the radio talking with the Artillery Command Center at Camp Carroll requesting a “SAVE-A-PLANE” vector away from the artillery fire support mission in which the Camp’s artillery batteries were currently engaged.  The command center gave him a specific sector for the medevac flight to safely operate in.

According to Ron Osborne, pilot; and Bennie C. Phillips, crewchief of one of the gunships; between 1900 and 2000 hours, the crew of the second Seahorse descended to the landing zone (LZ) to pick up some of the wounded Marines.  After the wounded were secured aboard the medevac, the aircraft climbed for altitude to rejoin the rest of the flight that was waiting for it near the Rockpile at 4,000 feet.

According to two gunship crewmen, the flight was flying from the south toward the north and the demilitarized zone (DMZ) when Capt. Ducat radioed for a change in the order of aircraft in the flight in preparation to pick up other wounded Marines.  Phil Ducat was in the process moving his aircraft into the lead when it was struck in the pilot’s compartment by an artillery shell from Camp Carroll’s artillery battery.

The two escort gunships were approximately 75 yards in trail behind the two medevac aircraft when it exploded.  The crews reported they watched in horror as the medevac helicopter instantaneously turned into a fireball with the main “rotor head going one way and the aircraft itself going straight down on fire like a flare.”

At the time of loss it was believed none of the crew was able to escape the fireball, and that the intense fire of the crash consumed all remains.  Phillip Ducat, Dean Reiter, Arthur Green, Vernon Parker and Peter Bossman were immediately listed Killed in Action/Body Not Recovered.

The Seahorse crashed and burned just to the south of Highway 9 approximately 11 miles west-southwest of Dong Ha, 13 miles northeast of Khe Sanh, 16 miles south of the demilitarized zone (DMZ) and 17 miles west of Quang Tri City, Quang Tri Province, South Vietnam.

Larry D. Robinson, another Marine helicopter aircraft commander, friend and roommate of Phil Ducat, was on temporary duty as a ground Forward Air Controller (FAC) with the 3rd Battalion, 7th Marines who were participating in Operation Prairie.  This battalion was protecting a bridge in the same area where the medevac helicopter crashed and burned.  This unit was also tasked with the ground search of the medevac’s crash site.  They found many pieces of the aircraft including a large number of engine parts.

According to Larry Robinson, they found one of Phil Ducat’s boots.  He said he immediately recognized it because of the way his friend kept them spit shined and the way he laced them with parachute cord.  The search team also recovered two badly charred bodies.  All the recovered remains were transported to a military mortuary where they were later identified as being Arthur Green and Vernon Parker.  Shortly thereafter the remains were returned to the men’s families for burial.  The mortuary staff was not able to make any identification of Phil Ducat based only on one recovered boot.  The recovery team believed the rest of the crew’s remains were incinerated in the fire that consumed their aircraft.

As tragic as this loss is, it is also the only documented instance wherein a Marine helicopter in flight was knocked out of the sky by American artillery at any time during the Vietnam War.

While the crew of the Seahorse almost certainly perished that day in 1966, and the chance of recovering their remains is slim at best, each man deserves to have his remains returned to his family, friends and country if at all possible.

For other Americans who remain unaccounted for in Southeast Asia, their fates could be quite different.  Since the end of the Vietnam War well over 21,000 reports of American prisoners, missing and otherwise unaccounted for have been received by our government.  Many of these reports document LIVE America Prisoners of War remaining captive throughout Southeast Asia TODAY.

Pilots and aircrews in Vietnam were called upon to fly in many dangerous circumstances, and they were prepared to be wounded, killed or captured.  It probably never occurred to them that they could be abandoned by the country they so proudly served.