On August 30, 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 30. They continued documenting the region’s resources and interactions with Native American tribes, advancing their exploration of the Louisiana Purchase.
• 1838: During the Mormon War in Missouri, tensions escalated. On or around August 30, non-Mormon vigilantes in Daviess and Carroll Counties intensified their campaign against Mormon settlers, with skirmishes contributing to 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) continued in Missouri. On August 30, Union forces were regrouping after their retreat from Springfield, while Confederate forces strengthened their control in southwest Missouri, highlighting Missouri’s pivotal role in the conflict.
• 1870: The Kansas City Stockyards expanded operations around August 30, reinforcing Kansas City’s position as a major livestock trading hub and boosting Missouri’s agricultural economy.
• 1904: The St. Louis World’s Fair, or Louisiana Purchase Exposition, was ongoing, with August 30 featuring international cultural exhibits and early Olympic events, showcasing Missouri’s global prominence.
• 1964: The St. Louis Cardinals played a notable game against the Pittsburgh Pirates at Busch Stadium on August 30, with Lou Brock stealing two bases and contributing to a Cardinals victory, reinforcing Missouri’s baseball legacy during their World Series-winning season.