The M1888 gun was a coastal artillery gun initially deployed as part of the Endicott system of fortifications. The first nine were deployed on the M1892 barbette carriage in 1898, but the improved M1894 and M1896 disappearing carriages soon became available, and approximately 64 additional weapons were deployed on these carriages by 1908. An "emergency" converted Rodman carriage was also used during the Spanish–American War in 1898 to quickly arm 21 emplacements with the modern 8-inch M1888 gun. These weapons were redeployed soon after the war ended. The disappearing carriage allowed the gun to remain behind a parapet resembling a hillside most of the time, thus largely invulnerable to low-angle enemy fire, which was the only type of enemy attack anticipated 1898–1910. Air and high-angle artillery attack would eventually severely impact US fortifications in the Philippines in World War II. Numerous additional weapons of other calibers including the 10-inch gun M1895, 12-inch gun M1895, and 12-inch coast defense mortars were also deployed in US coastal fortifications alongside the 8-inch guns. The 8-inch guns were deployed in the harbor defenses of Portland, Maine, Portsmouth, New Hampshire, New Bedford, Massachusetts, Long Island Sound, New York, Eastern New York, Southern New York, Delaware River, Baltimore, Maryland, Potomac River, Chesapeake Bay, Cape Fear River, North Carolina, Savannah, Georgia, Key West, Florida, Tampa Bay, Florida, Pensacola, Florida, Mobile, Alabama, Mississippi River, Galveston, Texas, San Francisco, California, Columbia River, and Puget Sound.