Col. Jeffrey Kenney said that Marines from Virginia and North Carolina were performing the training on Wednesday at Camp Lejeune when the accident occurred.
He said Staff Sgt. Jonathan Lewis, 31, was a native of Warrenton, Virginia. He said Lewis was inside the helicopter when he was killed.
Kenney says the training allows them to use rapelling and fast ropes techniques to get into difficult terrain where aircraft may not be able to land.
The Marines say two injured service members remain hospitalized Friday, while nine have been treated and released.
According to ABCNews, the incident marks the fifth incident this year, and the 18th Marine death, involving a helicopter/tilt rotator accident.
In January, two service members were killed in Southern California during a training accident.
On March 10, seven Marines, also based out of Camp Lejeune, were killed in a helicopter crash off the Florida Panhandle.
Six Marines were killed in a helicopter crash on May 12 during rescue operations following the earthquake in Nepal, and two other were killed five days later in an Osprey aircraft crash in Hawaii.
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