Spc. Nicholas C. Panipinto, 20, of Bradenton, Fla., died Wednesday from injuries sustained in the rollover at Camp Humphreys, the Army said in a statement sent to Stars and Stripes.
"The accident is under investigation," it said.
All five soldiers who were in the vehicle were taken to a nearby South Korean hospital, Eighth Army spokesman Lt. Col. Ellis Gales told Stars and Stripes. Panipinto died, two were released with non-life threatening injuries and the other two were seen by medical staff as a precautionary measure, he said.
A memorial service will be held at Camp Humphreys Friday for Panipinto, who joined the Army from Tampa, Fla., in January 2018. He completed one station unit training at Fort Benning, Ga., the military said.
Brigade commander Col. Kevin Capra expressed "heartfelt condolences" to Panipinto's family, friends and loved ones.
"Nicholas was a dedicated and essential member of the Ghost Battalion and Greywolf Brigade," Capra said, using the nicknames of the units. "We are all deeply saddened by the loss and will keep his family in our thoughts and prayers during this difficult time."
Of around 28,500 American troops in South Korea, most are based at Camp Humphreys, which is in the rural area of Pyeongtaek, about 55 miles south of Seoul.