1. On April 24, 1806, a group of Osage warriors attacked the Spanish St. Louis trade caravan near present-day Independence, Missouri. The attack was part of a long-running conflict between the two groups over control of trade routes.

2. On April 24, 1820, the U.S. Congress passed the Missouri Compromise, which admitted Missouri as a slave state and Maine as a free state and prohibited slavery in any new states north of the 36°30′ parallel.

3. On April 24, 1864, Union forces under General Alfred Pleasonton fought Confederate forces at the Battle of Pleasant Hill in Louisiana. Despite being outnumbered, the Union forces were able to hold their ground and force the Confederates to retreat.

4. On April 24, 1918, World War I pilot Larry Callahan was shot down over France and died in enemy territory. Callahan was born in Missouri and is remembered as one of the state's most decorated war heroes.

5. On April 24, 1983, the Kansas City Royals played their first game at the newly-built Royals Stadium. The team defeated the Texas Rangers 5-2, with star player George Brett hitting the first home run in the new stadium.