1. In 1812, Missouri's first constitution was written in Saint Louis. This document served as the foundation for the state's government for the following four decades.

2. On June 9, 1934, the infamous criminal duo Bonnie and Clyde were killed in a shootout with law enforcement officers in Bienville Parish, Louisiana. Although the incident did not take place in Missouri, the two outlaws had connections to the state and were infamous figures during the Great Depression.

3. In 1954, the U.S. Supreme Court handed down its landmark ruling in Brown v. Board of Education. The case, which originated in Topeka, Kansas, had implications for the segregation of schools in Missouri and other states throughout the nation.

4. On June 9, 1975, the Missouri Botanical Garden in Saint Louis was named a National Historic Landmark. The garden, which was established in 1859, is one of the oldest botanical institutions in the United States and is known for its extensive plant collections, research programs, and educational outreach efforts.

5. In 1991, the Missouri River reached its second-highest crest in history due to heavy rain and snow melt. The flooding caused widespread damage and forced thousands of residents to evacuate their homes. The disaster underscored the importance of flood control measures in the state and sparked long-term efforts to improve the river's management and infrastructure.