The Missouri territory came to the United States as part of the 1803 Louisiana Purchase, one of the best real estate deals the United States ever made. Before Missouri became the 24th state on August 10, 1821, certain compromises had to be made to keep a balance in the Union between the slave and non-slave states. Those compromises would later turn neighbor against neighbor. Celebrate your state's history by displaying state symbols, animals, and state flags. Find your supplies at Flagandbanner.com today.