Top: The United States Marine Corps infantry unit 2nd Battalion, 6th Regiment, reenacts a photo taken of the unit 100 years ago outside of the Marine Corps University Historical Division (below). The unit recently travled from Camp Lejeune, North Carolina on a Professional Military Education exercise to celebrate their 100 year anniversary. The unit was established aboard Marine Corps Base Quantico in 1917. - Top: The United States Marine Corps infantry unit 2nd Battalion, 6th Regiment, reenacts a photo taken of the unit 100 years ago outside of the Marine Corps University Historical Division (below). The unit recently travled from Camp Lejeune, North Carolina on a Professional Military Education exercise to celebrate their 100 year anniversary. The unit was established aboard Marine Corps Base Quantico in 1917.