1. On May 3, 1869, the Union Pacific Railroad connected with the Central Pacific Railroad at Promontory Summit, Utah, completing the first transcontinental railroad in the United States. This link greatly increased the speed and efficiency of transportation across the western half of the country, including Wyoming.

2. In 1888, on May 3, construction began on the Wyoming State Capitol Building in Cheyenne. This magnificent building is still in use today and is a significant landmark in Wyoming.

3. On May 3, 1945, Wyoming Governor Lester C. Hunt signed a bill creating the University of Wyoming's School of Law. Today, the College of Law is well-regarded and has a strong reputation for producing exceptional attorneys.

4. In 1956, on May 3, the Wyoming Department of Fish and Game established the state's first public shooting range in Lander. The range is still in operation and provides a safe and controlled environment for hunters and shooting enthusiasts.

5. On May 3, 1972, Wyoming's iconic Devils Tower National Monument was designated as the nation's first National Monument by President Richard Nixon. This breathtaking geological formation has played a significant role in Native American cultures for thousands of years and continues to be a popular destination for tourists and climbers alike.