1. Ohio became a state on March 1, 1803, but it wasn't until March 15 of that year that the first Ohio governor, Edward Tiffin, was inaugurated.

2. On March 15, 1913, the deadliest natural disaster in Ohio's history occurred when a flood devastated the city of Dayton. The floodwaters caused over $100 million in damages and claimed the lives of over 360 people.

3. In 1922, the first official Ohio state flag was adopted on March 15. The flag features a large blue triangle representing Ohio's hills and valleys, with white stars standing for the thirteen original states, and a red-and-white stripe symbolizing roads and waterways.

4. On March 15, 1975, the Rock and Roll Hall of Fame Foundation was established in Cleveland, Ohio. The Rock and Roll Hall of Fame officially opened its doors in 1995 and has since inducted over 300 musicians and performers.

5. Ohio has produced many notable figures throughout history, including artist George Bellows, astronaut Neil Armstrong, and aviator Orville Wright. All three were born on March 15, in the years 1882, 1930, and 1871, respectively.