Missouri Compromise is where the state of Missouri was brought into the U.S in result of the Louisiana purchase. Going in as a state and free state balance unequal. So in result a new state called Maine entered the U.S made it equal again. So to resolve this balance, border called the 30/36 line was created. This stated that if any new state was to enter the U.S above the line they would have to become a free state.
