Sgt. Amamda Eason, Headquarters and Service Battalion career planning sergeant, completed the Marine Corps Marathon Oct. 25 in Arlington, Va. More than 23,350 participants completed the 26.2 mile route, which was concluded at the Iwo Jima Marine Corps War Memorial. - Sgt. Amamda Eason, Headquarters and Service Battalion career planning sergeant, completed the Marine Corps Marathon Oct. 25 in Arlington, Va. More than 23,350 participants completed the 26.2 mile route, which was concluded at the Iwo Jima Marine Corps War Memorial.