The Minuteman Missile National Historic Site is an American national historic site established in 1999 near Wall, South Dakota, to illustrate the history and significance of the Cold War, the nuclear arms race, and intercontinental ballistic missile (ICBM) development. The site preserves the last intact Minuteman II ICBM system in the United States, in a disarmed and demilitarized status. Guided tours are available of the underground Launch Control Center, and a missile silo can be observed from above. Some 450 of the newer Minuteman III missiles are still on active duty at Malmstrom AFB, Montana, Minot AFB, North Dakota, and F. E. Warren AFB, Wyoming.

South Dakota is a landlocked state in the North Central region of the United States. It is also part of the Great Plains. South Dakota is named after the Dakota Sioux tribe, which comprises a large portion of the population with nine reservations currently in the state and has historically dominated the territory. South Dakota is the 17th largest by area, but the 5th least populous, and the 5th least densely populated of the 50 United States. Pierre is the state capital, and Sioux Falls, with a population of about 213,900, is South Dakota's most populous city. The state is bisected by the Missouri River, dividing South Dakota into two geographically and socially distinct halves, known to residents as "East River" and "West River". South Dakota is bordered by North Dakota to the north, Minnesota to the east, Iowa to the southeast, Nebraska to the south, Wyoming to the west, and Montana to the northwest.