1. In 1787, the Ohio Company of Associates was formed to purchase land for settlement in the Ohio River Valley. This company played a key role in the westward expansion of the United States.

2. On March 13, 1847, the Ohio Supreme Court ruled in the case of State v. Keeler that, under Ohio law, an infant could inherit property. This decision overturned the previous common law rule that only individuals who had reached the age of majority could inherit.

3. The first intercollegiate basketball game in Ohio took place on March 13, 1893, between Oberlin College and Case Western Reserve University. Oberlin won the game 25-14.

4. On March 13, 1913, a massive flood hit the state of Ohio, causing widespread damage and claiming the lives of over 400 people. The flood was caused by a combination of heavy rain and the failure of several dams and levees.

5. In 1933, construction began on the Ohio State Reformatory, a prison located in Mansfield. The prison gained fame for its distinctive architecture and was used as a filming location for the movie "The Shawshank Redemption."