South Dakota is a Midwestern state in the United States. It is named after the Lakota and Dakota (Sioux) American Indian tribes. South Dakota was admitted to the Union on November 2, 1889. North Dakota was admitted on the same day. South Dakota is probably best known as the location of Mount Rushmore. South Dakota consists of four major land regions: the Drift Prairie, the Dissected Till Plains, the Great Plains, and the Black Hills...