U.S. Marine Corps Sergeant Maj. Troy L. Black, sergeant major of the Marine Corps, speaks at the annual Sergeants Major of the Marine Corps Symposium at The Clubs of Quantico aboard Marine Corps Base Quantico, Va., Oct. 17, 2019. Sergeants Major of the Marine Corps, Sergeants Major, Master Gunnery Sergeants, and Master Chiefs gather to brief and plan the needs of the present and future of the Marine Corps. - U.S. Marine Corps Sergeant Maj. Troy L. Black, sergeant major of the Marine Corps, speaks at the annual Sergeants Major of the Marine Corps Symposium at The Clubs of Quantico aboard Marine Corps Base Quantico, Va., Oct. 17, 2019. Sergeants Major of the Marine Corps, Sergeants Major, Master Gunnery Sergeants, and Master Chiefs gather to brief and plan the needs of the present and future of the Marine Corps.