A spokesman for the base said in a news release that 26-year-old Spc. Louis Moua was an infantryman assigned to the 2nd Infantry Battalion, 1st Infantry Regiment, 2nd Stryker Brigade Combat Team.
He arrived at Joint Base Lewis-McChord in September 2015. Moua deployed in support of Operation Enduring Freedom from February to October 2014.
The spokesman said Moua and his unit were running through a wooded area Friday morning. Emergency staff from Madigan Army Medical Center responded and transported him to the hospital, where he was pronounced dead.
The incident is under investigation.