1. In 1868, the United States Congress passed an act admitting Wyoming as a territory, making it the first territory in the country to grant women the right to vote. This event marked a significant milestone in the history of women's rights in the United States.

2. The historic Union Pacific Hotel in Evanston, Wyoming, was opened on May 19, 1891. The hotel was designed by architect H.L. Stevens, and it served as a hub for railroad passengers and workers. Today, the Union Pacific Hotel is a museum and a popular tourist destination.

3. On May 19, 1934, a massive dust storm swept across Wyoming, prompting Governor Leslie A. Miller to declare a state of emergency. The storm was caused by severe drought conditions and poor land management practices, and it led to significant damage to crops, livestock, and infrastructure.

4. In 1958, the United States Air Force established a missile launch site near Wheatland, Wyoming, as part of the country's Cold War defense strategy. The site was operational until 1964, and it played a vital role in the development of intercontinental ballistic missiles.

5. The University of Wyoming was established on May 19, 1886, when Wyoming Governor Francis E. Warren signed the legislation creating the school. Today, the University of Wyoming is a top-tier research university with an enrollment of over 12,000 students.