1. Statehood Day: August 15 marks South Dakota's Statehood Day, celebrating the day the state officially became a part of the United States in 1889.

2. Wild Bill Hickok's Death: On August 15, 1876, legendary gunslinger Wild Bill Hickok was shot and killed while playing poker in a saloon in Deadwood, South Dakota. Today, visitors can still visit the site of his death at the historic Franklin Hotel and Saloon.

3. Corn Palace Festival: In Mitchell, South Dakota, the annual Corn Palace Festival kicks off on August 15, featuring live music, carnival rides, and food vendors. The festival is named after the famous Corn Palace building in Mitchell, which is decorated with intricate murals made entirely of corn.

4. Mining Strikes: August 15 was a significant day for labor disputes in South Dakota's mining industry. In 1890, miners in Lead went on strike, demanding safer working conditions and higher wages. Similarly, in 1921, miners in the Black Hills went on strike, leading to violent clashes with local law enforcement.

5. First Football Game: On August 15, 1901, the University of South Dakota played its first intercollegiate football game against the University of Nebraska. The game was held in Sioux City, Iowa, and resulted in a 20-0 victory for Nebraska. Today, USD's football program continues to thrive, with a record 22 conference championships and numerous NFL players to its name.