If you mean WW2, its because America wanted isolationism and didn't want to fight in the war. They were able to stay out of it for as long as they did because they didn't take sides.
the question is not clear what is the whole question??
Answer:
Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure.
Explanation:
Promoted the hunting and destruction of bison
