1. On July 23, 1916, a deadly circus train wreck occurred in Nashville, Tennessee, killing at least 18 and injuring over 100 people. The train was carrying the Sells-Floto Circus, which was on its way to Nashville for a performance.

2. In 1984, the World's Fair held in Knoxville, Tennessee, closed its gates on July 23 after a six-month run. The fair had attracted over 11 million visitors, making it one of the most successful fairs of its time.

3. On July 23, 1863, the Battle of Thompson's Station took place during the American Civil War. Union forces under Brigadier General John Coburn engaged Confederate forces under Major General Earl Van Dorn, resulting in a Union victory.

4. The famous Appalachian Trail, which spans over 2,000 miles from Georgia to Maine, passes through Tennessee. On July 23, 1937, the first section of the trail in Tennessee was officially opened, marking an important milestone in the trail's development.

5. On July 23, 1983, famous country singer Hank Williams Jr. was involved in a serious accident in Montana that left him with severe injuries. Williams had to undergo multiple surgeries and physical therapy in order to recover and return to performing.