1. On September 7, 1876, the Battle of Slim Buttes took place in South Dakota, just north of the Wyoming border. This battle was part of the Great Sioux War of 1876 and involved U.S. Army troops and Lakota Sioux and Cheyenne warriors. The battle resulted in a significant victory for the Native American forces.

2. In 1912, September 7 marked the day that Wyoming's first automobile license plates were issued. Prior to this, cars in the state had to display a cardboard sign with their license number.

3. On September 7, 1928, the iconic Wyoming landmark known as Devil's Tower was declared a National Monument by President Calvin Coolidge. Devil's Tower is a large igneous rock formation that rises 1,267 feet above the surrounding landscape.

4. In 1957, September 7 marked the day that the University of Wyoming's new Centennial Complex was dedicated. The complex includes the school's library, art museum, and planetarium, among other facilities.

5. On September 7, 1984, the controversial Wyoming economist and political figure James Geringer was inaugurated as Wyoming's 30th governor. During his time in office, Geringer championed the interests of the oil and gas industry and advocated for greater state control over public lands.