Generally speaking, it would be a "nation" that is the term that is is used for “a community of people that shares territory and a government”, since the other options usually reside within said country.
Answer: To abolish slavery.
Explanation: The 13th amendment to the United States Constitution provides that "Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction."
The Great Plains is the answer
