Koppenhafer, 35, of Mancos, Colorado, was killed Saturday by enemy small arms fire while conducting combat operations, the Department of Defense said in a Sunday news release.
Koppenhafer was assigned to the 2nd Marine Raider Battalion, Marine Forces Special Operations Command out of Camp Lejeune, North Carolina. The incident is under investigation, the Pentagon said.
Koppenhafer was supporting Operation Inherent Resolve, the official name for the US-led operation fighting ISIS. A Pentagon inspector general’s report on the fight against ISIS released earlier this month warned that “despite losing its territorial ‘caliphate,’ the Islamic State in Iraq and Syria (ISIS) solidified its insurgent capabilities in Iraq and was re-surging in Syria.”