1. In 1977, a tornado outbreak in eastern South Dakota caused significant damage and claimed three lives. The storms affected the communities of Dell Rapids, Colton, and Garretson.

2. On June 20, 2013, a wildfire sparked by lightning burned through the Black Hills National Forest in western South Dakota. The blaze, known as the West Ash Fire, eventually consumed over 1,500 acres and forced the closure of several recreational areas.

3. In 1881, the town of Milbank was founded in Grant County, South Dakota. Named after founder Jeremiah Milbank, the town became a center of commerce and agriculture in the region.

4. On June 20, 1919, South Dakota Governor Peter Norbeck signed a bill creating the state's first official flag. The design features a blue field with a sunburst in the center and the state seal in the center.

5. In 1969, the United States Air Force began testing its Minuteman III intercontinental ballistic missile at Ellsworth Air Force Base near Rapid City. The missile, capable of delivering a nuclear warhead, was a key component of the country's Cold War defense strategy.