30 maio 1854 ano - missouri compromise

Descrição:

In an effort to preserve the balance of power in Congress between slave and free states, the Missouri Compromise was passed in 1820 admitting Missouri as a slave state and Maine as a free state. ... In 1854, the Missouri Compromise was repealed by the Kansas-Nebraska Act.
https://www.loc.gov/rr/program/bib/ourdocs/Missouri.html

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