1. Tennessee became the 16th state in the United States on August 15, 1796. The state was formed from land ceded by North Carolina and was named after the Cherokee word "Tanasi."

2. The Battle of Fort Donelson was fought in Tennessee on February 11-16, 1862, during the Civil War. But on August 15, 1863, the Union army seized control of the railroad at Knoxville, Tennessee, a strategic move that weakened the Confederacy's supply lines.

3. On August 15, 1872, the first United States National Park was established in the state of Tennessee. Known as Yellowstone National Park, it spans across Wyoming, Montana, and Idaho, as well as a small portion of Tennessee.

4. The Grand Ole Opry, one of the most famous country music venues in the world, made its debut broadcast from Nashville, Tennessee, on August 15, 1942. The show has continued to be a staple in the country music industry and has hosted some of the biggest names in music history.

5. On August 15, 1977, the King of Rock and Roll, Elvis Presley, died at his home, Graceland, in Memphis, Tennessee. His death was a significant loss for the music industry, and his legacy continues to inspire generations of musicians and fans.