1. On April 7, 1814, a treaty was signed between the United States and the Wyandot, Delaware, Shawnee, Ottawa, Chippewa, and Potawatomi tribes at the conclusion of the War of 1812. The treaty, known as the Treaty of Greenville, ceded large portions of present-day Ohio to the United States.

2. Ohio native and aviation pioneer Orville Wright made his first flight in Europe on April 7, 1909, in Pau, France. He completed a flight of 177 feet in just under 15 seconds, marking a significant achievement in the advancement of aviation.

3. On April 7, 1927, the Ohio River flood reached its peak, with the river cresting at over 80 feet in some places. The flood caused widespread damage and displacement, with over 1 million people affected across several states.

4. Ohio native and former governor James M. Cox announced his candidacy for president on April 7, 1920. He went on to win the Democratic nomination but was ultimately defeated by Republican Warren G. Harding in the general election.

5. April 7, 2006, marked the 20th anniversary of the first ever WrestleMania event, which was held in Columbus, Ohio in 1986. The event featured several wrestling legends, including Hulk Hogan and Mr. T, and helped establish the brand as a major force in the world of professional wrestling.