1. In 1893, the town of Aberdeen was incorporated in South Dakota. Known as the "Hub City," Aberdeen is home to Northern State University and is the third largest city in the state.

2. On July 18, 1895, the South Dakota State Penitentiary in Sioux Falls opened its doors. At the time, it was the only state prison in South Dakota and housed both male and female inmates.

3. The city of Pierre became the capital of South Dakota on July 18, 1904. Prior to that, the capital had been located in various other cities, including Yankton, Huron, and Bismarck (when South Dakota was part of the Dakota Territory).

4. In 1949, the Oahe Dam and Reservoir project began in South Dakota. Located on the Missouri River, the dam created a large reservoir for hydroelectric power and irrigation purposes. Today, the reservoir is a popular destination for fishing and water sports.

5. On July 18, 1985, the movie "Sylvester" was released. The film, which stars Melissa Gilbert and Richard Farnsworth, was partially filmed in South Dakota's Black Hills region.