Remains of Troops Killed in SoCal ‘Training Mishap' Arrive in Delaware

The recovered remains will be transferred to Dover Air Force Base, Delaware, for preparation for burial

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The remains of seven Marines and a Sailor killed in a “training mishap” off the coast of Southern California arrived Wednesday at Dover Air Force Base in Delaware.

Each casket, draped in an American Flag, was loaded one-by-one into a U.S. Air Force C-17 Globemaster III at Marine Corps Air Station Miramar by a pallbearer group made up of Marines and Sailors, then flown to the East Coast where they will be received by family.

The remains of another Marine killed in the accident -- the only fallen Marine recovered the day of the mishap -- were flown to Dover AFB August 5.

The eight Marines and lone Navy sailor were wrapping up an Amphibious Assault Vehicle (AAV) training exercise off the coast of San Clemente Island July 30 when their vehicle began taking on water. Fifteen Marines and the sailor were on board.

Six pallbearers of Marines and Sailors escorted each casket aboard a U.S. Air Force C-17 Globemaster III bound for Dover AFB for final preparation for burial before being released to their families for final arrangements.

Crews with the 15th Marine Expeditionary Unit (MEU), I Marine Expeditionary Force (MEF), and the Makin Island Amphibious Ready Group (ARG) located the sunken amphibious assault vehicle August 3, USMC officials at Camp Pendleton said Tuesday.

The fallen include:

  • Pfc. Bryan J. Baltierra, 18, of Corona, California
  • Lance Cpl. Marco A. Barranco, 21, of Montebello, California
  • Pfc. Evan A. Bath, 19, of Oak Creek, Wisconsin
  • Navy Hospital Corpsman 3rd Class (Fleet Marine Force) Christopher Gnem, 22, of Stockton, California
  • Pfc. Jack-Ryan Ostrovsky, 20, of Bend, Oregon
  • Cpl. Wesley A. Rodd, 22, of Harris, Texas
  • Lance Cpl. Chase D. Sweetwood, 18, of Portland, Oregon
  • Cpl. Cesar A. Villanueva, 21, of Riverside, California
  • Lance Cpl. Guillermo S. Perez, 19, of New Braunfels, Texas

According to the Marine Corps, Gnem was posthumously advanced to the rank of Petty Officer Third Class and posthumously awarded his enlisted Fleet Marine Force Warfare Specialist qualification.

A group of service members and veterans are gathering together for a run in honor of the deceased military members who perished in a training incident.

NBC 7 spoke with family members of Cpl. Cesar A. Villanueva, 21, of Riverside, California, a rifleman with Bravo Company, BLT 1/4, 15th MEU.

“It’s more of a relief and we’re not wondering where he is at. We now have answers, obviously, it's not the answer that we wanted, but in a way its comforting to know we have those answers,” said cousin Shirley Stubblefield. “He was just an amazing person, very kind and full of life, love. I hardly ever saw him sad.”

The sunken AAV has also been recovered. The cause of the incident is still under investigation.

The AAV sank to a depth of about 385 feet during an evening "shore-to-ship" training maneuver off the coast of San Clemente Island – about 78 miles away from San Diego – on July 30.

Sixteen crewmembers were on board. One Marine was pronounced dead following the incident. Seven others were rescued, with two transported to the hospital with critical injuries. Another eight service members were missing and later presumed dead.

The identities of the service members presumed dead were released Sunday.

The AAV 'Training Mishap': What Happened?

A total of 15 Marines and one Navy sailor were inside the AAV when the group reported taking on water around 5:45 p.m. on July 30, the USMC said.

The group was traveling from the shores of San Clemente Island to a Navy ship when the AAV started sinking about halfway through their training routine, according to Lt. Cameron H. Edinburgh, a Marine Corps spokesman for Camp Pendleton.

The 26-ton, tank-like craft sank in hundreds of feet of water — too deep for divers — making it difficult to reach.

Eight Marines -- or half of the service members involved in the incident -- were rescued from the sunken AAV that day. One of them died. Two of them, in critical condition, were taken to Scripps Memorial Hospital in San Diego.

The injured were later identified as a Marine rifleman with Bravo Company, BLT 1/4, 15th MEU, and a Marine assault amphibious vehicle crewmember with Mechanized Company, BLT 1/4, 15th MEU. The Marine crewmember had been upgraded to stable condition over the weekend, per officials.

What Is an AAV and What About Prior Mishaps?

The Marines use the amphibious assault vehicles to transport troops and their equipment from Navy ships to land. They are nicknamed "amtracs" because the original name for the vehicle was “amphibious tractor.”

The armored vehicles, designed to be buoyant, can hold more than 20 passengers and up to 250 pounds of equipment and can weigh as much as 30 tons. They are outfitted with machine guns and grenade launchers. They look like tanks as they roll ashore for beach attacks, with Marines pouring out of them to take up positions.

The AAV involved in this incident had three water-tight hatches and two large troop hatches.

The vehicles have been used since 1972 and are continually refurbished.

The Marine Corps commandant, Gen. David Berger, suspended waterborne operations of all of its more than 800 amphibious assault vehicles across the branch until the cause of the accident is determined.

He said the move was out of “an abundance of caution.”

The July 30 mishap was the deadliest of several similar incidents involving amtracs that have occurred during Camp Pendleton exercises in less than a decade.

In 2011, a Marine was killed when an AAV sank during a training exercise in Oceanside Harbor. Six Marines were inside that AAV.

And in 2017, 14 Marines and one sailor were hospitalized after their AAV hit a natural gas line, igniting a fire that engulfed the landing craft during a training exercise at Camp Pendleton, the sprawling coastal Marine Corps base north of San Diego. One of the Marines was critically injured.

The Marine Expeditionary Force is the Marine Corps’ main warfighting organization. There are three such groups, each of which are made up of ground, air and logistics forces.

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