1. The Battle of Slim Buttes took place on July 7, 1876, near present-day Reva, South Dakota. In this battle, a group of Lakota warriors led by Chief Crazy Horse attacked a detachment of the U.S. Army's 7th Cavalry, resulting in a significant defeat for the cavalry. The battle was part of the Black Hills War, which was waged over control of the gold-rich Black Hills area.

2. On July 7, 1920, the South Dakota Department of Agriculture and Food was officially established. The department was created to promote and regulate the state's agriculture industry, which remains crucial to the state's economy to this day.

3. July 7, 1966 marked the opening of Badlands National Park's scenic loop road, which offers visitors breathtaking views of the park's unique landscape. The 31-mile road winds past towering rock formations, colorful canyons, and prairie grasslands, making it a must-see for anyone visiting South Dakota.

4. On July 7, 1972, South Dakota's senators voted in favor of a bill that would grant federal recognition to the Oglala Sioux Tribe's government. This historic decision was a significant step towards restoring sovereignty and self-determination to Native American nations in the United States.

5. In 1993, the town of Sturgis, South Dakota held its first annual Sturgis Motorcycle Rally on July 7th. Since then, the event has grown to become one of the largest and most famous motorcycle rallies in the world, drawing hundreds of thousands of visitors to the Black Hills region each year.