1. In 1861, Missouri's state government voted to remain in the Union during the early days of the American Civil War. This decision would later lead to Missouri becoming a key battleground state during the conflict.

2. On March 13, 1804, the Missouri Territory was created following the Louisiana Purchase. The territory would eventually become the state of Missouri in 1821.

3. The St. Louis Blues, a professional ice hockey team in the National Hockey League (NHL), was founded on March 13, 1967. The team has won the Stanley Cup championship once, in 2019.

4. In 1852, Susan B. Anthony visited St. Louis, Missouri and gave her first public speech advocating for women's suffrage. Anthony went on to become a leading figure in the women's suffrage movement and played a pivotal role in securing the 19th Amendment to the U.S. Constitution, which granted women the right to vote.

5. On March 13, 1941, the Missouri State Capitol building caught fire and suffered extensive damage. The building was restored and reopened in 1945, but the fire resulted in the loss of many artifacts and historic documents.