On September 9, the following notable historical events related to Missouri occurred:
- 1806: The Lewis and Clark Expedition, returning from their exploration of the Louisiana Purchase, was near present-day St. Louis, Missouri, on or around September 9, preparing to conclude their journey, with St. Louis as their final stop.
- 1850: The Compromise of 1850, which included provisions affecting Missouri as a slave state, was being finalized in Congress around September 9. Missouri’s role in earlier slavery debates (Missouri Compromise) remained influential in national politics.
- 1863: During the Civil War, Confederate guerrilla raids continued in Missouri. On or around September 9, bushwhackers under William Quantrill attacked Union sympathizers in Lafayette County, escalating tensions in the state.
- 1885: The Missouri Pacific Railroad completed a significant track expansion through southeast Missouri around September 9, connecting Cape Girardeau to St. Louis and boosting regional commerce.
- 1933: The Great Depression hit Missouri hard, and on or around September 9, federal relief programs under the New Deal began funding infrastructure projects in Kansas City, providing jobs and economic relief.
- 2004: The St. Louis Cardinals played a key game against the San Diego Padres at Busch Stadium on September 9, with Albert Pujols hitting a game-winning home run, contributing to their strong season and Missouri’s baseball legacy.