The Missouri Compromise of 1820 established the latitude 36°30′ as the northern limit for slavery to be legal in the territories of the west.
Step-by-step explanation:
- The Missouri Compromise, as it was known, would remain in impact for just over 30 years till the Kansas-Nebraska act of 1854 revoked it.
- In 1857, the Supreme Court in Dred Scott's case found the agreement unconstitutional, setting the stage for the nation's final journey through the Civil War.
- In 1820, while growing sectional tensions over the slavery issue, the U.S. Congress passed a law welcoming Missouri to the Union as a captive state and free state.