1. Wyoming officially became a state on August 15, 1890, after being part of the Dakota, Utah, and Idaho territories.
2. On August 15, 1908, the town of Dubois experienced a devastating fire that destroyed most of its buildings, with only a few surviving structures standing to this day.
3. August 15, 1917, marked the beginning of the Sheep Wars, a violent conflict between sheepherders and cattlemen in Wyoming that lasted for several years.
4. The world's first national park, Yellowstone, which is partly located in Wyoming, was established on August 15, 1872.
5. In 2017, Wyoming celebrated the 150th anniversary of the famous Cheyenne Frontier Days. The event, which began on August 15, 1867, is still held annually and has become one of the country's largest outdoor rodeos.