1. In 1800, the first Ohio constitution was adopted in Chillicothe, Ohio.
2. On June 7, 1933, the Ohio National Guard was called in to suppress a violent miners' strike in Hocking County, known as the Hocking Valley Coal Strike. The conflict resulted in the deaths of two miners and one strikebreaker.
3. Canton, Ohio native William McKinley, the 25th President of the United States, was nominated for president at the 1896 Republican National Convention on June 7 of that year.
4. On June 7, 1990, the Cincinnati Reds defeated the Los Angeles Dodgers 1-0 in the longest game in Riverfront Stadium history. The game lasted 15 innings and took 5 hours and 27 minutes to complete.
5. In 1954, Toledo, Ohio native George Dantzig developed the simplex algorithm, a widely used optimization tool in business and economics. The algorithm is still used today in industries such as transportation, energy, and telecommunications.