What decision forbade slavery forever in the Louisiana Purchase north of the 36°30' parallel?

1 Answer
Mar 23, 2018

Answer:

The Missouri Promise in 1820

Explanation:

In 1820, Missouri joined the Union and Maine(originally part of New Hamsphire) joined the Union as a free state. Missouri became the limit of where slavery was legal and thus slavery was abolished above the 36°30 parallel.