On August 23, the following notable historical events related to Missouri have been recorded:

• 1804: The Lewis and Clark Expedition was near present-day Sioux City, Iowa, across from Missouri’s Atchison County, on or around August 23. They continued documenting the region’s geography and interactions with Native American tribes, advancing their exploration of the Louisiana Purchase.
• 1838: During the Mormon War in Missouri, tensions remained high. On or around August 23, non-Mormon vigilantes in Daviess and Carroll Counties continued their campaign against Mormon settlers, with skirmishes escalating the conflict that led to the Mormon expulsion order later in 1838.
• 1861: During the Civil War, the aftermath of the Battle of Wilson’s Creek (August 10) was ongoing in Missouri. On August 23, Union forces were regrouping after their retreat from Springfield, while Confederate forces maintained control in southwest Missouri, underscoring Missouri’s critical role in the conflict.
• 1876: The St. Louis-based Anheuser-Busch brewery began experimenting with new bottling techniques around August 23, a key innovation that helped expand Budweiser’s distribution and reinforced Missouri’s leadership in the brewing industry.
• 1904: The St. Louis World’s Fair, or Louisiana Purchase Exposition, was ongoing, with August 23 featuring international scientific exhibits and early Olympic events, highlighting Missouri’s global cultural and economic prominence.
• 1964: The St. Louis Cardinals played a notable game against the Pittsburgh Pirates at Busch Stadium on August 23, with Ken Boyer hitting a game-winning home run, contributing to their World Series-winning season and reinforcing Missouri’s baseball legacy.