 Some 6-inch and 4.7-inch guns were purchased from the United Kingdom and mounted at the Endicott forts still under construction, including the two 4.7-inch guns at Fort Strong.Fort Strong also had four batteries of 3-inch rapid fire guns, with two guns each (or 8 guns total).Battery Basinger (with two 3-inch M1898 guns) was completed in 1901, the remainder (each with two 3-inch M1902 guns) were completed in 1906.