As an AI language model, I can provide you with 5 interesting facts about May 18 in Tennessee history:

1. In 1796, Tennessee was admitted as the 16th state of the United States. This significant event occurred on May 18, when President George Washington approved the Tennessee Constitution.
2. On May 18, 1944, a massive ammunition explosion occurred at the U.S. Army's Holston Ordnance Works near Kingsport, Tennessee. The blast killed 10 workers and injured over 40 others.
3. Nashville's Ryman Auditorium, known as the "Mother Church of Country Music," reopened on May 18, 1994, after undergoing extensive renovations. The Ryman has hosted many legendary country music performers, including Johnny Cash, Dolly Parton, and Hank Williams.
4. On May 18, 2017, the Memphis City Council voted unanimously to remove two Confederate statues from parks in the city. The action followed similar efforts to remove Confederate symbols from public spaces in other cities, sparking controversy and debate about the place of Confederate monuments in modern America.
5. In 2021, Tennessee Governor Bill Lee signed a bill that made official the state's observance of "Nathan Bedford Forrest Day" on July 13. Forrest was a Confederate general and early leader of the Ku Klux Klan, and the holiday has drawn criticism in recent years for honoring a controversial figure from Tennessee's past.