1. On August 20, 1794, a treaty was signed between the United States government and the Miami tribe of Native Americans. The Treaty of Greenville ceded much of what is now Ohio to the U.S. and opened up the area to settlement.

2. In 1857, the first Indiana State Fair opened on August 20 in Indianapolis. The fair has since become an annual tradition, showcasing Indiana agriculture, industry, and culture.

3. On August 20, 1916, Indiana native Thomas R. Marshall was inaugurated as Vice President of the United States. Marshall, who had previously served as Governor of Indiana, is perhaps best known for his quip about the role of the Vice President: "Once there were two brothers. One went away to sea; the other became Vice President. Neither was ever heard from again."

4. In 1964, the Beatles played a concert at the Indiana State Fairgrounds Coliseum on August 20. The show was part of the band's first American tour, and drew a record-breaking crowd of 30,000 fans.

5. On August 20, 1990, a tornado struck the town of Plainfield, Indiana, killing 29 people and causing over $200 million in damage. The Plainfield tornado was one of the strongest and deadliest in Indiana's history, with winds exceeding 300 miles per hour.