Ralph Hoffmann, retired master gunnery sergeant, eats lunch at the Sergeant Major of the Marine Corps Picnic aboard Marine Corps Base Quantico on August 3, 2013. Hoffman is a veteran of several well-known Marine Corps battles including Inchon and the Chosin Reservoir, Korea. - Ralph Hoffmann, retired master gunnery sergeant, eats lunch at the Sergeant Major of the Marine Corps Picnic aboard Marine Corps Base Quantico on August 3, 2013. Hoffman is a veteran of several well-known Marine Corps battles including Inchon and the Chosin Reservoir, Korea.