The DOD identified Gunnery Sgt. Diego D. Pongo, 34, and Capt. Moises A. Navas, 34, as victims of an incident on March 8.
Pongo was a critical skills operator from Simi Valley, Calif. Navas was a special operations officer from Germantown, Md.
DOD said both Marines were supporting Iraqi Security Forces in north central Iraq when they were killed. The men died during a mission to eliminate an ISIS stronghold in a mountainous area.
Both Pongo and Navas were assigned to 2nd Marine Raider Battalion, Marine Forces Special Operations Command at Camp Lejeune.