In 1820 another compromise was made to keep a balance of power between the slave and free states. What two new states were admitted by the Missouri Compromise?

The Missouri Compromise of 1820 admitted Missouri as a slave state and Maine as a free state. This compromise aimed to maintain the balance of power between slave and free states in the U.S. Senate. Additionally, it established a geographic line at the 36°30′ parallel, north of which slavery was prohibited in the Louisiana Territory.