1. In 1865, the Virginia and Truckee Railroad began operation in Nevada. It was the state's first railroad and played a crucial role in the development of Nevada's mining industry.

2. On March 20, 1891, the Nevada State Legislature passed a bill creating the Nevada State Board of Health. The board was responsible for overseeing public health initiatives in the state, including the implementation of vaccination programs.

3. The city of Las Vegas was officially incorporated on March 20, 1911. The city was founded in 1905 as a result of the construction of the Union Pacific Railroad and quickly grew into a popular destination for tourists and gamblers.

4. On March 20, 1945, the Nevada State Senate passed a bill allowing women to serve on juries. Nevada was one of the first states in the country to grant women this right.

5. In 1985, Nevada's largest earthquake in more than 20 years struck on March 20. The quake, which measured 6.1 on the Richter scale, caused extensive damage in the city of Tonopah but no fatalities were reported.