McClellan discovered General Robert E. Lee's battle plan.
Obviously, infiltration and access to battle plans allow for the opponent to figure out what their opponent's plans are, thus giving McClellan the victory at Antietam.
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Because they interfered with the creation of a modern socialist society
They lost their main source of food which led to starvation and war among the once harmonious tribes.
Explanation:
I really dont know what you mean by this question. can you explain it more in order for me to get it and answer your question please.