1. In 1884, a tornado ripped through the town of Mount Vernon, Ohio, causing major damage and killing several people. It remains one of the deadliest tornadoes in Ohio history.
2. On June 23, 1917, the Ohio National Guard was mobilized to quell labor unrest in the coal mines of southeastern Ohio. The incident became known as the "Battle of Virden".
3. In 1938, the Cincinnati Reds set a major league baseball record by scoring 15 runs in the first inning of a game against the Philadelphia Phillies.
4. The first "Mr. Ohio" bodybuilding competition was held on June 23, 1962, and was won by Berle Adams. The competition has been held annually ever since.
5. In 1972, Ohio became the 38th state to ratify the Equal Rights Amendment to the U.S. Constitution, which guarantees equal rights under the law regardless of sex.