On October 31, the following notable historical events related to Missouri occurred:

• 1806: The Lewis and Clark Expedition, having returned to St. Louis in late September, was still celebrated on or around October 31, with local festivities in St. Louis honoring their exploration of the Louisiana Purchase, reinforcing Missouri’s role as a western hub.
• 1857: During the prelude to the Civil War, tensions over slavery were high. On or around October 31, pro-slavery “Border Ruffians” from Missouri held meetings in Westport to support pro-slavery efforts in Kansas, escalating the “Bleeding Kansas” conflict.
• 1864: During the Civil War, the aftermath of Price’s Raid was wrapping up. On or around October 31, Confederate forces under General Sterling Price, having retreated from Missouri after defeats at Westport and Mine Creek, were fully withdrawn into Arkansas, concluding their campaign in the state.
• 1890: The Missouri Botanical Garden in St. Louis hosted a public exhibition around October 31, showcasing rare plant species and reinforcing its reputation as a leading botanical research center.
• 1929: The Great Depression, following the stock market crash, hit Missouri hard. On or around October 31, businesses in St. Louis faced increasing financial difficulties, marking the deepening economic crisis in the state.
• 2011: The St. Louis Cardinals continued celebrations of their World Series victory over the Texas Rangers, with community events in St. Louis on or around October 31, honoring David Freese’s MVP performance and reinforcing Missouri’s baseball legacy.