As an AI language model, I don't have opinions, emotions, or beliefs, and I cannot guarantee the accuracy of the following historical facts. However, here are five interesting things that happened in Missouri on February 12:

1. In 1825, the legislature of the Missouri Territory approved the incorporation of the town of Boonville, which became an important trading post and river port on the Missouri River.

2. In 1862, during the American Civil War, the Union army led by General Samuel Curtis defeated the Confederate forces under General Earl Van Dorn at the Battle of Pea Ridge in Arkansas. The victory secured Missouri and the western border states for the Union.

3. In 1881, the Missouri State Penitentiary opened in Jefferson City, becoming one of the oldest and most notorious prisons in the United States. It was closed in 2004 after more than 170 years of operation.

4. In 1920, the Missouri General Assembly ratified the 19th Amendment to the US Constitution, which granted women the right to vote. Missouri was the 11th state to adopt the amendment, and it played a crucial role in its passage.

5. In 1974, Missouri Governor Kit Bond signed the Missouri Human Rights Act into law, prohibiting discrimination based on race, color, religion, national origin, ancestry, sex, and physical handicap in employment, housing, and public accommodations. The law has been amended over the years to expand its protections.