1. In 1862, the Battle of Perryville took place in Kentucky, which had significant implications for Ohio. The battle was part of the Civil War, and Ohio contributed a significant number of soldiers to the Union Army. The Union's success in the battle helped to prevent Confederate forces from gaining control of Kentucky and potentially advancing into Ohio.

2. In 1916, the first electric traffic signal in the US was installed in Cleveland, Ohio. The signal used red and green lights to control traffic, and it was a significant innovation that helped to reduce accidents at busy intersections.

3. In 1967, legendary Ohio State football coach Woody Hayes achieved his 100th career victory with the Buckeyes. Hayes went on to become one of the most successful coaches in college football history and led Ohio State to three national championships during his tenure.

4. In 1998, astronaut John Glenn, a native of Ohio, returned to space at the age of 77 on the Space Shuttle Discovery. Glenn had been the first American to orbit the Earth in 1962, and his return to space was seen as a testament to his enduring bravery and commitment to exploration.

5. In 2018, an Ohio woman named Sarah McBride became the first openly transgender person to hold a state-level legislative seat in the US. McBride was elected to the Delaware State Senate, but her groundbreaking victory was celebrated by many in Ohio and beyond as a milestone for LGBTQ rights and representation.