1. Wyoming became a state on March 18, 1890. The territory had previously been carved out of the Dakota, Idaho, and Utah territories, and had been struggling for several years to gain statehood. The admission of Wyoming to the Union was significant because it was the first state to grant women the right to vote.

2. On March 18, 1922, the last known sighting of a wild passenger pigeon in Wyoming occurred. The passenger pigeon was once the most abundant bird in North America, but overhunting and habitat destruction led to its extinction in the wild by the early 20th century.

3. The town of Sundance, Wyoming, located in the northeast part of the state, was established on March 18, 1889. The town was named after the infamous outlaw Harry Alonzo Longabaugh, who was better known as the Sundance Kid.

4. March 18, 1965, marked the dedication of the National Historic Trails Interpretive Center in Casper, Wyoming. The center tells the story of the various historic trails that crossed Wyoming, including the Oregon Trail, California Trail, and Pony Express Route.

5. The Cheyenne Frontier Days Rodeo, which is one of the largest outdoor rodeos in the world, has its roots in Wyoming history on March 18, 1897. That was when the first Cheyenne Frontier Days took place, and it has been a major annual event ever since. The rodeo attracts thousands of visitors from around the world and features competitions in bull riding, steer wrestling, barrel racing, and more.