1. In 1863, the Battle of Brice's Crossroads took place near Baldwyn, Mississippi, just across the Tennessee border. The Confederate army, led by General Nathan Bedford Forrest, defeated a Union force under the command of General Samuel D. Sturgis.

2. On June 15, 1917, the City of Memphis officially opened the Memphis Municipal Airport, which would later be known as Memphis International Airport. The airport played a significant role in military transport during World War II and is now one of the busiest cargo airports in the world.

3. Musician and author Johnny Cash was born on June 15, 1932, in Kingsland, Arkansas, just a few miles from the Tennessee border. Cash was known for his iconic country music sound and his rebellious image, which has inspired countless musicians over the decades.

4. On June 15, 1945, Tennessee Governor Jim Nance McCord signed a law officially banning the teaching of the theory of evolution in the state's public schools. The law was later repealed in 1967 in a case that went all the way to the Supreme Court.

5. In 1993, the Great Flood of 1993 peaked in Tennessee and much of the Midwest, causing billions of dollars in damage and displacing thousands of people. The flood was one of the most significant natural disasters in American history and is still felt in many communities today.