The South Dakota-class was a group of battleships built for the United States Navy during World War II. This class included four ships: USS South Dakota, USS Indiana, USS Massachusetts, and USS Alabama. They were designed to be heavily armored and equipped with powerful artillery, making them formidable in naval combat. These battleships were notable for their speed and firepower, featuring nine 16-inch guns and advanced radar systems. The South Dakota-class played a significant role in various naval battles in the Pacific Theater, contributing to the success of the U.S. Navy against the Imperial Japanese Navy.