As an AI language model, I can provide you with 5 interesting historical facts about March 2 in Missouri History:

1. In 1825, the first steamboat reached Franklin, a town on the Missouri River. The steamboat was named the "Enterprise" and it traveled from New Orleans to Franklin in less than 30 days, making it the fastest steamboat trip at the time.

2. On March 2, 1861, Missouri held a vote on whether to secede from the Union or stay as part of it. The vote was close, but ultimately the state decided to remain in the Union.

3. The first Missouri state park, Big Spring State Park, was established on March 2, 1924. The park features Big Spring, which is one of the largest springs in the world.

4. In 1955, the Missouri State Capitol in Jefferson City was damaged by a fire. The fire destroyed the cupola and dome of the building, which had to be rebuilt.

5. March 2, 1980, marked the opening of the Harry S. Truman Presidential Library and Museum in Independence, Missouri. The library houses documents and artifacts from Truman's presidency, as well as exhibits on his life and career.