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The farmers and herders were the lowest level.
They were in the peasant class along with the slaves.
1862, was the first significant Union victory of the American Civil War (1861-65). In an effort to gain control of rivers and supply lines west of the Appalachians, the bulk of his troops to nearby Fort Donelson before surrendering to Union forces. off Confederate access to two key waterways for the remainder of the war.
disease is the correct answer
All the above can be foynd in central and southwest asia