Here are 5 interesting facts about March 20 in Idaho history:

1. In 1910, the governor of Idaho created the Board of Control to manage water rights and oversee irrigation projects. This move helped to develop the state's agriculture industry, which remains a major force in Idaho to this day.

2. In 1933, the Idaho State Penitentiary witnessed one of the deadliest prison riots in American history. Over 200 inmates seized control of the prison and killed three guards before being subdued. The incident led to an overhaul of the state's prison system.

3. In 1962, the famous Hollywood actress Marilyn Monroe made an appearance in Boise, Idaho, as part of a USO tour. Monroe performed songs, danced, and signed autographs for the troops stationed in the city. She later described the experience as one of the highlights of her career.

4. In 1995, the U.S. Fish and Wildlife Service listed the Snake River sockeye salmon as an endangered species. This designation was a blow to Idaho's fishing industry, which relies heavily on the salmon for commercial and recreational purposes.

5. In 2009, a magnitude 6.5 earthquake struck southern Idaho, causing widespread damage and disrupting daily life for many residents. The earthquake was the strongest to hit the state since 1983 and served as a reminder of Idaho's vulnerability to seismic activity.