1. In 1927, an earthquake measuring 6.3 on the Richter scale struck the town of Parker, Arizona, killing three people and causing significant damage to buildings and infrastructure in the area.

2. On March 18, 1913, President Woodrow Wilson signed the Webb-Kenyon Act into law, outlawing the transportation of alcohol across state lines for the purpose of violating local Prohibition laws. The act had a significant impact on Arizona, which had already passed statewide Prohibition in 1915.

3. Arizona Statehood Day is celebrated on March 18 each year, marking the date in 1912 when Arizona officially became the 48th state in the Union. The event is marked by parades, festivals, and community events across the state.

4. In 2013, the Arizona House of Representatives voted to impeach Arizona Corporation Commission Chair Susan Bitter Smith, alleging that she had a conflict of interest due to her employment as a lobbyist for a telecommunications company. Bitter Smith resigned from her position shortly afterward.

5. On March 18, 1995, the University of Arizona Wildcats men's basketball team won their first-ever NCAA championship, defeating the University of Kentucky Wildcats by a score of 89-79. The victory remains one of the most significant moments in Arizona sports history.