Their mission was to explore the unknown territory, establish trade with the Natives and affirm the sovereignty of the United States in the region.
<span>Prior to WW2, America had an isolationist foreign policy. It never joined the League of Nations, and staunchly avoided taking side with any colonialist power.
Anyway, America's priority at the time was to tackle the depression (which saw unemployment rose to 25%). On the whole the American population and their politicians were totally ignorant or blindsided to the frighten events in Germany and Japan, until it was too late for the countries invaded by the Axis aggressors.</span>
Plessy v. Ferguson, the separate but equal law which segregated schools under the idea of separate but equal but of course wasn’t equal. P v. F was the case btw.