Settled the conflict that had arisen from Missouri's application for statehood. Neither North or south wanted each other to have a majority in the Senate by upsetting the balance of slave to free states. The compromise consisted of one Missouri admitted as a slave state, two main admitted as a free state, and three no more to slavery allowed in the Louisiana purchase north of the southern boundary of Missouri. A cause of the Civil War. Also known as the compromise of 1820, 36/30 line.