1. On July 20, 1864, during the American Civil War, Confederate forces under General John Bell Hood attacked Union troops under General William T. Sherman in the Battle of Peachtree Creek, near Atlanta. The Confederates were repulsed, and the battle marked a turning point in the Atlanta campaign.

2. In 1969, on July 20th, the Apollo 11 mission, led by Neil Armstrong and Buzz Aldrin, landed on the moon, marking a historic achievement for space exploration. Georgia residents watched the event with pride and excitement, as the state had played a significant role in developing the spacecraft's propulsion systems.

3. On July 20th, 1976, President Gerald Ford visited Atlanta to sign a bill authorizing the construction of the Martin Luther King Jr. Center for Nonviolent Social Change. The center, located in Atlanta's historic Auburn Avenue district, was established to educate people about the life and teachings of Dr. King and to inspire them to work for justice and equality.

4. On July 20th, 1986, the Atlanta Braves played their last game at Atlanta-Fulton County Stadium, which had been their home field for over 20 years. The team moved to the newly-constructed Turner Field the following year. Today, Turner Field has been converted into Georgia State Stadium, home of the Georgia State Panthers football team.

5. On July 20th, 1996, Atlanta hosted the opening ceremonies of the Summer Olympic Games, which were held in the city that year. The Olympics brought international attention to Georgia, and the state's economy was boosted by the influx of tourists and athletes. The games were memorable for many reasons, including the bomb attack at Centennial Olympic Park that killed two people and injured over 100 others.