A model of an M1900 6-inch gun, made in 1908. These were rapid-fire guns, mounted at Fort Wool across the Hampton Roads from Fort Monroe, intended for use against small craft such as torpedo boats and minesweepers. Minefields were laid in the vicinity of most of the Endicott-era batteries in an effort to keep enemy ships within range of the big guns...but we couldn't have that enemy doing anything about the mines, so these smaller guns were intended to keep 'em hoppin'.