1. In 1868, the Treaty of Fort Laramie was signed, establishing the Great Sioux Reservation which included parts of Wyoming, South Dakota, and Montana. The treaty marked the end of Red Cloud's War.

2. In 1934, the first largescale rodeo was held in Cheyenne, Wyoming. The event was called "Frontier Days" and featured professional cowboys and cowgirls competing in various events such as bull riding, steer wrestling, and barrel racing.

3. In 1958, the first summit of Wyoming's Grand Teton mountain was achieved by a team of climbers led by Paul Petzoldt. The mountain is one of the highest peaks in the United States, reaching an elevation of 13,775 feet.

4. In 1984, the Wyoming State Museum officially opened to the public in Cheyenne. The museum features exhibits on the state's natural history, culture, and development.

5. In 2003, the Yellowstone National Park fires, which had been burning since June, began to be contained. Over 2.2 million acres of land were burned, making it the largest fire complex in the park's history. The fires were caused by a combination of lightning strikes and human activity.