1. In 1819, Missouri became a US territory: On June 26, 1819, the US Congress passed a law that transformed Missouri from a territory known as Missouri Territory to the 24th US state. Missouri's citizens celebrated their statehood on August 10, 1821.

2. First Missouri State Fair: The first Missouri State Fair was held in Boonville, Missouri on June 26, 1858. The fair was organized to showcase the best agricultural products of Missouri.

3. First railroad bridge over the Missouri River: On June 26, 1873, the first railroad bridge over the Missouri River was completed. The railroad bridge connected Omaha, Nebraska to Council Bluffs, Iowa, and allowed the Union Pacific Railroad to transport goods and passengers from the east to the west.

4. The deadliest tornado in Missouri history: On June 26, 1957, a deadly tornado struck the town of Ruskin Heights, Missouri, killing 44 people and injuring hundreds. The storm also caused massive damage to buildings and infrastructure in the area.

5. Busch Stadium II opens: On June 26, 1966, Busch Stadium II opened in St. Louis, Missouri. The stadium, which was used by the St. Louis Cardinals for more than 30 years, was later demolished in 2005 to make room for the new Busch Stadium III.