1. Wyoming became a state on March 20, 1890. It was the 44th state to join the union and the first state to grant women the right to vote.

2. On March 20, 1872, President Ulysses S. Grant signed the Yellowstone National Park Protection Act, creating the world's first national park. Wyoming is home to a majority of the park's land.

3. In 1965, the first-ever Teton Dam was authorized to be built on the Teton River in Wyoming. The construction was completed in 1976 and was intended to supply irrigation water to nearby farmlands. But the dam failed just two years later, causing severe flooding and the loss of several lives.

4. March 20, 1916, saw the establishment of Devils Tower National Monument by President Woodrow Wilson. The natural wonder is a sacred site for many Native American tribes and has also been a popular location for rock climbing.

5. Cody, Wyoming, which is now known as the "Rodeo Capital of the World," hosted its first-ever rodeo on March 20, 1919. It was organized by local cowboys and eventually evolved into the Cody Stampede Rodeo, which has been held annually ever since.