What geographic line was established as part of the Missouri Compromise?

The geographic line established as part of the Missouri Compromise was the 36°30' line. This compromise, enacted in 1820, was significant in addressing the contentious issue of slavery's expansion into new territories. The 36°30' parallel was drawn across the Louisiana Purchase, and the agreement stipulated that slavery would be prohibited in territories north of this line, with the exception of Missouri, where slavery was permitted.

The establishment of this line was a pivotal moment in U.S. history, as it aimed to balance the interests of slave and free states and reduce sectional conflict. By setting this boundary, the Missouri Compromise temporarily eased tensions between pro-slavery and anti-slavery factions, although it did not provide a lasting solution to the issue of slavery in America. This compromise was later challenged by subsequent events, notably the Kansas-Nebraska Act, which effectively repealed its provisions and reignited national disputes over slavery.