1. In 1904, the World's Fair opened in St. Louis, Missouri on June 6th. The fair was an international event that celebrated world cultures and showcased innovative technology and inventions.

2. On June 6, 1925, the first Missouri State Highway Patrol officer was sworn in. The Highway Patrol is responsible for enforcing traffic laws and providing assistance to motorists on Missouri's highways.

3. On June 6, 1944, Allied forces landed on the beaches of Normandy, France during World War II. Many Missourians served in the military during the war, and some were part of the D-Day invasion.

4. In 1967, the St. Louis Cardinals played their first game at the new Busch Memorial Stadium on June 6th. The stadium was built to replace Sportsman's Park and was the home of the Cardinals until 2005.

5. On June 6, 1979, the first female police officers in Kansas City, Missouri were sworn in. Prior to this, the police force had been exclusively male. These women paved the way for future female officers in the department.