USS Massachusetts (BB-59), known as "Big Mamie" to her crewmembers during World War II, was a battleship of the second South Dakota class. She was the seventh ship of the United States Navy to be named in honor of the sixth state, and one of two ships of her class (along with her sister Alabama) to be donated for use as a museum ship. Massachusetts has the distinction of having fired the US Navy's first and last 16-in (406 mm) shells of the war.



During World War II Massachusetts was initially assigned to duty in the Atlantic Fleet during which she successfully crippled the Vichy French battleship Jean Bart in a gun duelduring Operation Torch. Transferred to the Pacific fleet in 1943, Massachusetts participated in the Solomon Islands campaign and the Philippines Campaign, and in the latter campaign took part in the Battle of Leyte Gulf. In 1945 she was one of several ships assigned to shell targets on Honshū, the largest of the Japanese Home Islands. Following the end of World War II, Massachusetts was involved in routine operations off the US coast and eventually reassigned to the Atlantic fleet. Decommissioned in 1947, she was laid up in the reserve fleet at Norfolk, Virginia until stricken from the Naval Vessel Register in 1962.



In an effort to spare the battleship from scrapping, citizens of Massachusetts pooled resources to raise money for her transfer to the Massachusetts Memorial Committee, and in 1965 the Navy formally donated the battleship to the committee. Massachusetts was towed to what would later be renamed Battleship Cove, Fall River, Massachusetts, and formally opened as a museum ship on 14 August 1965.