1. Ohio was granted statehood on August 15, 1803. This means that Ohio was the 17th state to join the United States of America. The state was originally part of the Northwest Territory, which was composed of modern-day Illinois, Indiana, Michigan, Ohio, and Wisconsin.

2. The Ohio State University was founded on August 15, 1870. The university was originally called the Ohio Agricultural and Mechanical College and was created in order to provide education in agriculture and other practical fields. Today, Ohio State is one of the largest universities in the United States with more than 60,000 students.

3. The Pro Football Hall of Fame was dedicated on August 15, 1963, in Canton, Ohio. The hall of fame is a museum that honors the greatest players, coaches, and contributors to the game of professional football. Each year, up to eight new members are inducted into the hall of fame.

4. On August 15, 1914, the first ship passed through the Panama Canal. The ship was a steamship called the SS Ancon, and it sailed from the Atlantic Ocean to the Pacific Ocean through the canal. The canal greatly reduced the travel time and distance between the east and west coasts of the United States.

5. On August 15, 1907, the Ohio River flood began. The flood was one of the worst in the history of the United States, and it affected several states including Ohio, Indiana, Kentucky, and Illinois. The flood destroyed homes, businesses, and farmland, and it is estimated that more than 100 people lost their lives as a result.