1. On September 24, 1868, the historic Fort Laramie Treaty was signed, which marked the end of Red Cloud's War and guaranteed the Lakota people ownership over the Black Hills, a territory that later became a source of conflict between the Lakota and the US government.

2. In 1908, the town of Brookings was officially incorporated in South Dakota. Brookings is home to South Dakota State University and has a vibrant arts, culture, and sports scene.

3. The Corn Palace Festival, which celebrates South Dakota's strong agricultural heritage, was established in Mitchell in 1892. The festival features live music, art displays, carnival rides, and food vendors, and draws visitors from around the state and beyond.

4. On September 24, 1973, the Crazy Horse Memorial in the Black Hills was dedicated to honor the legendary Lakota warrior and leader. The massive granite mountain carving depicts a mounted Crazy Horse pointing to his homeland.

5. South Dakota became the first state to enact a statewide smoking ban in bars and restaurants on September 24, 2002. The ban was controversial at the time, but studies have shown that it has led to improved public health outcomes and reduced healthcare costs.