1. In 1864, the Wyoming Territory was established. Before this, the area was part of the Dakota, Utah, and Nebraska territories. The establishment of the Wyoming Territory marked a step towards statehood for the region, which was eventually achieved in 1890.

2. In 1872, Yellowstone National Park was created. Located primarily in Wyoming, Yellowstone was the first national park in the United States and is widely considered the first national park in the world. It is known for its geothermal features, such as Old Faithful geyser, as well as its wildlife, including grizzly bears, wolves, and bison.

3. In 1904, the first state fair was held in Douglas, Wyoming. The fair celebrated Wyoming's agricultural and industrial achievements, and featured exhibits showcasing livestock, machinery, and local products. The Wyoming State Fair continues to be held annually, rotating between several cities throughout the state.

4. In 1955, the University of Wyoming football team played its first homecoming game against Colorado State University. The game, which took place in Laramie, Wyoming, was won by Wyoming 20-0. Homecoming has been a longstanding tradition at the University of Wyoming, and the football team has often played a pivotal role in the festivities.

5. In 2000, the Devils Tower National Monument was expanded by 2,500 acres. Located in northeastern Wyoming, Devils Tower is a striking geological feature that rises 1,267 feet above its surroundings. It is a popular destination for rock climbers and hikers, and has cultural significance for several Native American tribes. The expansion of the monument area helped to protect more of the surrounding landscape and preserve the natural beauty of the region.