On July 15, the following notable historical events related to Missouri have been recorded:
- 1804: The Lewis and Clark Expedition, navigating the Missouri River, was near present-day Otoe County, Nebraska, across from Missouri’s Atchison County, on or around July 15. They documented the area’s flora, fauna, and Native American interactions, advancing their exploration of the Louisiana Purchase.
- 1820: Missouri’s constitutional convention, held in St. Louis, was wrapping up around July 15. The convention finalized the state’s first constitution, a critical step toward Missouri’s admission as a state in 1821 under the Missouri Compromise.
- 1861: During the Civil War, Missouri saw continued conflict. On July 15, Union forces under General Nathaniel Lyon were positioning themselves in southwest Missouri, with skirmishes reported near Springfield, setting the stage for the Battle of Wilson’s Creek.
- 1870: The Kansas City, Missouri, Board of Trade was established around July 15, formalizing the city’s role as a major grain and livestock trading hub, boosting Missouri’s economic prominence in the Midwest.
- 1904: The St. Louis World’s Fair, or Louisiana Purchase Exposition, was ongoing, with July 15 featuring prominent educational exhibits and international displays, highlighting Missouri’s global cultural significance.