Missouri became the 24th state of the Union on August 10, 1821! It’s named after the Missouri (Niúachi) Tribe, but you can also call it The Show-Me State! Its capital is Jefferson City, and its largest city is Kansas City! Missouri’s state motto is Salus populi suprema lex esto or “Let the good of the people be the supreme law!” This state is famous for the Gateway Arch, Mark Twain’s boyhood home, George Washington Carver National Monument, and the starting points for the Lewis & Clark Expedition, Pony Express, Oregon Trail, Santa Fe Trail, and California Trail!