The Albany Plan of Union was a plan to create a unified government for the Thirteen Colonies, strongly suggested by Benjamin Franklin, then an 48 year old senior leader and a delegate from Pennsylvania, at the Albany Congress on July 10, 1754 in Albany, New York.
Sentence 4 doesn't belong
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They end slavery because of amendments
I'm afraid I couldn't give you a complete answer, or the answer that you're looking for, for this question regarding the Native-born Americans in 1860's since there is no map provided with this question. Try re-posting this question with the map on it.