1. On May 9, 1868, Wyoming officially became a US territory. This marked an important milestone in the history of the state, as it paved the way for Wyoming to eventually become a full-fledged state in 1890.

2. May 9, 1903, was a significant day in Wyoming's history as the state's Women's Suffrage Law was passed, making Wyoming the first state in the United States to grant women the right to vote. This groundbreaking decision paved the way for women's rights movements across the country.

3. On May 9, 1930, the famous climber and explorer Paul Petzoldt was born in Wyoming. Petzoldt was known for his numerous mountaineering achievements, including the founding of the National Outdoor Leadership School, which is still operating today.

4. May 9, 1945, marked the end of World War II in Europe. Although Wyoming was not directly involved in the fighting, the state was deeply impacted by the war through the sacrifices made by its citizens and the role that Wyoming played in supplying troops and resources.

5. On May 9, 1985, the F4 tornado that hit the town of Barneveld in Wisconsin also caused damage in parts of Wyoming. Although the state did not suffer the same level of devastation as Barneveld, the tornado was a significant event in Wyoming's history and illustrates the impact of natural disasters on communities across the country.