Ka kammala wannan magana: A shekarun da suka biyo bayan Yaƙin Basasa, St. Louis ya zama birni na huɗu mafi girma a ƙasar, bayan New York City, Philadelphia, da Chicago. Har ila yau, ya sami ci gaba mai saurin ci gaba da sufuri da kuma ci gaban masana'antu. Wannan lokacin ya ƙare da
1904 World's Fair da 1904 Wasannin Olympics na bazara, waɗanda aka gudanar a lokaci guda a St. Louis.