1. The first St. Patrick's Day parade in Ohio was held in Cleveland in 1867. It featured Irish immigrants marching through the streets with their native instruments, such as bagpipes and drums, and wearing green clothing.

2. On March 17, 1903, the Wright brothers conducted their first successful flight in Dayton, Ohio. Orville Wright piloted the Wright Flyer for 12 seconds, covering a distance of 120 feet.

3. The City of Dublin, Ohio, named after Dublin, Ireland, holds an annual St. Patrick's Day parade and festival. The celebration features traditional Irish music, dance, food, and crafts, drawing thousands of visitors each year.

4. In 2005, Guinness World Records recognized the Buckeye Barbecue & Sweet Corn Festival in Medina, Ohio, for having the largest St. Patrick's Day parade in the world. The parade featured over 2,500 participants and attracted over 200,000 spectators.

5. On March 17, 1970, the Ohio National Guard was dispatched to Kent State University to quell anti-war protests. The guardsmen fired into a crowd of unarmed students, killing four and injuring nine others. The tragedy sparked national outrage and led to a reevaluation of the government's handling of anti-war protests.