Fort Duvall
Fort Duvall was a Coast Artillery fort, part of the Harbor Defenses of Boston, in Massachusetts. What was then called Hog Island in Hull, Massachusetts was acquired by the U.S. government in 1917, and the fort was constructed in the early 1920s. It had only one gun battery, Battery Long, but it mounted the largest caliber weapons in the entire harbor defense system: a pair of 16-inch guns. These were the 16-inch gun M1919, of which only seven were deployed; 16-inch weapons deployed later were supplied by the Navy. Circa 1920 the Brewster Islands Military Reservation and the Calf Island Military Reservation were considered for a 16-inch battery; at that time a twin naval-type turret was envisioned. However, Fort Duvall was built instead. In 1922 the fort was named for Major General William Penn Duvall (1847-1920). A graduate of West Point, Duvall was born in Maryland, was a principal assistant to the Army Chief of Artillery, and served two tours of duty in the Philippines (the second as commander of all Army troops there), where he distinguished himself by his even-handed administration of the islands. The long-range guns of Fort Duvall could cover an arc running roughly from Gloucester in