1. The Toledo War ended on May 13, 1836: An ongoing dispute between Ohio and the neighboring state of Michigan over the Toledo Strip was resolved on May 13, 1836, when Congress granted Ohio statehood and jurisdiction over the contested land.

2. The first electric streetcar in Ohio's history was launched on May 13, 1884: The Columbus Street Railway Company ran the first electric streetcar in Ohio between the Ohio State University campus and Downtown Columbus.

3. The Great Dayton Flood occurred on May 13, 1913: Heavy rainfall caused the Great Miami River to flood, resulting in one of the worst natural disasters in Ohio's history. The flood claimed over 360 lives and caused millions of dollars in damage.

4. The Cleveland Orchestra performed its first concert on May 13, 1918: The concert, held at Grays Armory in Cleveland, marked the beginning of what would become one of the most renowned orchestras in the world.

5. The first Ohio State Fair began on May 13, 1850: Held in Dayton, the fair featured agricultural exhibits, livestock competitions, and various recreational activities. Today, the Ohio State Fair is held annually in Columbus and attracts over 900,000 visitors each year.