On this day March 6, 1820
The Missouri Compromise is signed into law by President James Monroe. The compromise allows Missouri to enter the Union as a slave state, but makes the rest of the northern part of the Louisiana Purchase territory slavery-free.
The Missouri Compromise was an agreement passed in 1820 between the pro-slavery and anti-slavery factions in the United States Congress, involving primarily the regulation of slavery in the western territories.
It prohibited slavery in the former Louisiana Territory north of the parallel 36°30′ north except within the boundaries of the proposed state of Missouri. Prior to the agreement, the House of Representatives had refused to accept this compromise and a conference committee was appointed. The United States Senate refused to concur in the amendment, and the whole measure was lost.