Marine Killed in Humvee Rollover at Twentynine Palms Combat Center

A Marine died after his Humvee rolled over during a training exercise Saturday at Twentynine Palms, California, the service announced on social media.

The Marine died the following day, Sunday, after being treated at a local naval hospital and medically evacuated to a regional hospital, where he was pronounced deceased by medical authorities.

The name of the Marine is being withheld for 24 hours after all of the next-of-kin are notified, which is a common practice for the services. No other Marines were injured, and the cause of the rollover is under investigation, according to the service.

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"We extend our deepest condolences to the family, friends and colleagues of the Marine during this difficult time," Marine Corps Air Ground Combat Center Twentynine Palms said in a statement on social media late Sunday evening.

The Marine was assigned to the Tactical Training Exercise Control Group, a unit that helps facilitate and oversee exercises at the training center. The rollover occurred during Service Level Training Exercise 5-24, or SLTE.

While the direct cause of the incident is unknown, rollovers are among the major risks during military training and are one of the top fatal incidents for on-duty troops, Military.com previously reported. In 2021, a government watchdog report found that 123 soldiers and Marines had died in noncombat vehicle accidents since 2011.

The report said that the Army and Marine Corps had practices to reduce rollover risk, but that units didn't alway use them. It also found that lack of training and little oversight were contributing factors common in rollovers.

The Marine who died as a result of the rollover was treated at Robert E. Bush Naval Hospital, which is located on the Twentynine Palms installation. He was then medically evacuated to Desert Regional Medical Center in Palm Springs, California.

In December, Sgt. Matthew K. Bylski was killed when his amphibious combat vehicle, or ACV, rolled over at Camp Pendleton, California. Fourteen other Marines were injured in that rollover.

"He absolutely loved being in the Marine Corps," Ken Bylski, Matthew's father, told Military.com last December. "He didn't follow anybody. He did what he wanted to do. It didn't matter to him. He did his own thing no matter what. ... He was just a great kid. I say kid. ... He grew into a great man."

Related: Marine Corps Identifies Sergeant Killed in California Amphibious Vehicle Rollover