1. Missouri became a state: On November 20, 1820, Missouri was admitted to the Union as the 24th state, becoming the first state west of the Mississippi River to be admitted.

2. Great Uprising begins: On November 20, 1860, the Great Uprising, a series of civil disturbances that occurred in St. Louis and surrounding areas across Missouri began, as pro-slavery sympathizers opposed the emergence of the anti-slavery Republican Party.

3. Truman Library dedication: On November 20, 1957, the Harry S. Truman Library was dedicated in Independence, Missouri. The library holds important historical artifacts and documents from Truman's presidency, as well as other collections related to American history.

4. State Capitol fire: On November 20, 1911, a devastating fire broke out at the Missouri State Capitol building in Jefferson City, causing significant damage to the structure. It took several years to repair the damage caused by the fire and restore the building to its former glory.

5. First football game: On November 20, 1890, the first intercollegiate football game in the state of Missouri was played between the Missouri School of Mines and Metallurgy (now the Missouri University of Science and Technology) and the St. Louis University Billikens. The Missouri School of Mines won the game by a score of 6-4.