1. 1868 - The Treaty of Fort Laramie was signed on May 5. The treaty established a number of reservations in Wyoming, including the Fort Bridger Indian Reservation, the Wind River Indian Reservation, the Shoshone Indian Reservation, and the Blackfeet Indian Reservation.

2. 1889 - Wyoming became the 44th state in the Union on May 5. Prior to statehood, Wyoming was a territory that had a reputation for being a wild and lawless place.

3. 1900 - On May 5, the town of Sundance, Wyoming was incorporated. Sundance is named after the infamous outlaw, Harry Longabaugh, who was better known as the "Sundance Kid."

4. 1936 - On May 5, Yellowstone National Park was officially opened for the season. Yellowstone was the world's first national park and is home to a number of unique geothermal features, including Old Faithful and the Grand Prismatic Spring.

5. 2012 - On May 5, the town of Douglas, Wyoming celebrated its centennial. Douglas is known for its annual Wyoming State Fair and Rodeo, which is held each August and attracts thousands of visitors from around the world.