1. On September 9, 1886, President Grover Cleveland signed the Dawes Act into law, which resulted in the forced assimilation of many Native American tribes in Wyoming and across the nation.

2. On September 9, 1911, Wyoming became the first state in the nation to grant women the right to vote, more than nine years before the 19th Amendment guaranteed that right to women across the United States.

3. In 1937, construction began on the Grayrocks Dam near Wheatland, Wyoming on September 9. The dam was completed two years later and provided much-needed irrigation and flood control for the region.

4. One of the deadliest train disasters in Wyoming history occurred on September 9, 1904, when two Union Pacific trains collided head-on near Hanna, killing 14 people and injuring 26.

5. On the lighter side, September 9, 1956, marks the first ever "Wyoming Day" celebration, which continues to be observed annually to celebrate the state's history, culture, and people.