1. In 1894, the first Labor Day parade was held in Cleveland, Ohio. The gathering was organized by labor unions to recognize the contributions of the American worker.

2. In 1945, the deadliest plane crash in Ohio history occurred near Waynesville. A B-25 Mitchell bomber crashed into a creek, killing all 13 people on board. The crash was caused by poor visibility due to heavy fog.

3. In 1861, the Civil War battle of Carnifex Ferry took place in West Virginia, just across the Ohio border. Union troops defeated Confederate forces in the battle, which was an early victory for the Union in the war.

4. In 1988, the Great Ohio River Flood caused significant damage in many Ohio communities, including Cincinnati, Marietta, and Portsmouth. The flood was caused by heavy rain and snow melt, and resulted in 16 deaths and $650 million in damages.

5. In 1977, the first black mayor of a major Ohio city was elected in Cleveland. Carl Stokes was an attorney and civil rights activist who served two terms as mayor from 1967 to 1971. His brother, Louis Stokes, was also a prominent Ohio politician and the first black member of Congress from Ohio.