The Oregon Trail, the answer you are looking for is, in fact, indubitably, irrefutably, one-hundred percent, surely is The Oregon Trail.
Answer:
Saratoga was immensely important because it convinced the French to join the American cause in the Revolution and also halted a planned British division of New England from the rest of the colonies.
Hoover believed that American "rugged individualism" would keep the economy moving.
Do you mean what is Plessy v. Ferguson?
If thats what you mean then it is...........when the supreme court ruled that "separate but equal" was constitutional.