1. On July 20, 1832, the city of Nashville held its first public sale of lots for the development of a new neighborhood known as Germantown. This area was initially settled by German immigrants and the sale marked the beginning of a new era of growth and development in Nashville.

2. In 1863, during the American Civil War, Federal troops under the command of General William S. Rosecrans captured the town of Winchester, Tennessee. This victory secured the vital Nashville and Chattanooga Railroad and paved the way for further Union advances in the region.

3. On July 20, 1925, the famous Scopes Monkey Trial took place in Dayton, Tennessee. This trial pitted the forces of religious fundamentalism against advocates of evolution theory and became a national sensation, with coverage in newspapers and on radio broadcasts across the country.

4. In 1952, the Atomic Energy Commission began construction of the Oak Ridge National Laboratory in Oak Ridge, Tennessee. The facility was built to conduct research on nuclear energy and remains one of the largest scientific research facilities in the United States.

5. On July 20, 1969, Tennessee residents, like people all over the world, watched as Apollo 11 astronaut Neil Armstrong became the first human to set foot on the moon. This historic achievement represented the culmination of years of research and development by NASA and marked a new era in human exploration of space.