On September 30, the following notable historical events related to Missouri occurred:

• 1806: The Lewis and Clark Expedition, having returned to St. Louis earlier in September, was still being celebrated on or around September 30, with ongoing 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 September 30, pro-slavery groups in St. Louis organized meetings to counter abolitionist efforts, reflecting Missouri’s divided stance in the national debate.
• 1861: During the Civil War, the aftermath of the First Battle of Lexington (September 20) continued in Missouri. On September 30, Confederate forces under Sterling Price were organizing their control over Lexington, solidifying their strategic position in the state.
• 1890: The St. Louis-based Anheuser-Busch brewery expanded its bottling operations around September 30, enhancing Budweiser’s national distribution and reinforcing Missouri’s prominence in the brewing industry.
• 1927: The Kansas City Stockyards processed a record number of livestock around September 30, underscoring Kansas City’s role as a major agricultural hub and boosting Missouri’s economy.
• 1998: The St. Louis Cardinals played a significant game against the Montreal Expos at Busch Stadium on September 30, with Mark McGwire hitting his final home run of the season, ending with a record-breaking 70, cementing Missouri’s baseball legacy.