1. On June 20, 1863, the Battle of Middle Creek took place in Eastern Kentucky, which was an important conflict in the Civil War. Although it did not occur in Ohio, many Ohio soldiers fought in the battle as part of the Union Army.

2. The first agricultural experiment station in the United States was established in Wooster, Ohio on June 20, 1882. The station was created to improve farming practices and increase food production in the state.

3. On June 20, 1920, Ohio became the 6th state to ratify the 19th Amendment to the Constitution, which granted women the right to vote. This was a major milestone in the fight for women's suffrage.

4. Neil Armstrong, the first man to walk on the moon, was born in Wapakoneta, Ohio on June 20, 1930. Armstrong's achievement was a major milestone in space exploration and cemented Ohio's place in history as a hub of aviation and aerospace.

5. The Ohio State Fair, one of the largest state fairs in the country, opens on June 20 every year and runs for 12 days. The fair features food, livestock shows, carnival rides, concerts, and other events, drawing hundreds of thousands of visitors from all over the state and beyond.