1. On August 6, 1945, the United States dropped an atomic bomb on the Japanese city of Hiroshima, ultimately leading to Japan's surrender and the end of World War II. The decision to drop the bomb was made at the Potsdam Conference in Missouri earlier that summer.
2. August 6, 1821 marked Missouri's official admission into the Union as the 24th state. The first state capital was located in the city of St. Charles.
3. In 1861, the Missouri State Guard, made up of Confederate sympathizers, captured the Union arsenal in St. Louis. This event is known as the Camp Jackson Affair and is considered one of the catalysts for the Civil War.
4. On August 6, 1927, the Missouri Historical Society unveiled a plaque marking the site of the first meeting of Lewis and Clark with Sacagawea in May of 1804. The meeting took place near present-day St. Charles, Missouri.
5. August 6, 1951 marked the groundbreaking ceremony for what is now known as the Harry S. Truman Presidential Library and Museum in Independence, Missouri. The library is dedicated to preserving the legacy of the 33rd President of the United States.