on Key West, both to take advantage of its strategic location and to bring law and order to the Key West town. On March 25, 1822, naval officer Matthew C. Perry sailed the schooner Shark to Key West and planted the U.S. flag claiming the Keys as United States property. In 1823, a naval base was established to protect shipping merchants in the lower keys from pirates that would eventually evolve through the Civil War, the Spanish American War, two world wars, and the Cold War as Naval Station Key West, eventually home to the Fleet Sonar School, Marine Barracks Key West, Submarine Squadron 4, Submarine Squadron 12, Destroyer Squadron 12, and various diesel-powered submarines and surface ships. NAVSTA Key West was closed in 1974 as part of post-Vietnam War force reductions across the Department of Defense. A portion of the original NAVSTA Key West still remains under Navy control as Naval Air Station Key West-Truman Annex while a portion containing Fort Zachary Taylor was conveyed to the State of Florida as Fort Zachary Taylor State Park. The Truman Little White House has also been preserved as a museum based on its history as a part-time residence of President Harry S. Truman during his presidency. The remainder of the original base was conveyed to civilian control for redevelopment and now comprises The Key West Amphitheater, Truman Waterfront Park, residential redevelopment consisting of both homes and condominiums, and a portion of Mallory Square. Key West was always an important military post, since it sits at the northern edge of the deepwater channel connecting the Atlantic and the Gulf of Mexico (the southern edge away is Cuba) via the Florida Straits. Because of this, Key West since the 1820s had been dubbed the "Gibraltar of the West". Fort Taylor was initially built on the island. The Navy added a small base from which sailed to its demise in Havana at the beginning of the Spanish–American War which later evolved into NAVSTA Key West. Naval Air Station Key West At the beginning of World War II the Navy increased its presence from , including all of Boca Chica Key's and the construction of Fleming Key from landfill. The Navy built the first water pipeline extending the length of the Keys, bringing fresh water from the mainland to supply its bases. At its peak 15,000 military personnel and 3,400 civilians were at the base.