1. On June 22, 1861, Jefferson City, the capital city of Missouri, was captured by Union troops during the American Civil War. The Confederate army had been camped outside the city, but withdrew when they heard the Union troops were approaching. The Union army took control without a fight, and Jefferson City remained a Union stronghold throughout the war.

2. On June 22, 1933, the Kansas City Massacre occurred in Kansas City, Missouri. A group of criminals attempted to free a convicted felon who was being transported by federal agents. In the ensuing shootout, four police officers and the convict were killed, and one of the criminals was also killed. The incident led to increased law enforcement efforts against organized crime in the United States.

3. On June 22, 1962, the first official Wal-Mart store opened in Rogers, Arkansas, just across the border from Missouri. Wal-Mart would go on to become one of the largest and most successful retail chains in the world, with its headquarters in Bentonville, Arkansas.

4. On June 22, 1981, the St. Louis Cardinals baseball team played their final game at Busch Stadium, which had been their home field since 1966. The Cardinals moved to a new stadium the following year, but the old stadium remained standing until it was demolished in 2005.

5. On June 22, 2009, a massive tornado struck the town of Sedalia, Missouri, causing widespread damage and injuring at least 33 people. The tornado was classified as an EF3 on the Enhanced Fujita scale, with winds estimated to have reached up to 165 miles per hour. It was one of several tornadoes that struck the region that day, causing extensive damage to homes, businesses, and other structures.