Куантико
3/6 was reactivated June 14, 1922, at Quantico, Virginia, as the 3rd Battalion, 6th Regiment and assigned to the 4th Brigade. They participated in maneuvers at Gettysburg, Pennsylvania, June–July 1922 and attached to the Marine Corps Expeditionary Force. They were shortly thereafter deactivated August 10, 1922, at Quantico, Virginia