What terms did the Missouri comprise impose on any newly created western territories

The Missouri compromise wanted to extend slavery into other states. Congress accepted Missouri as a slave state and also admitted Maine as a free state. By 1819, the United States was formed by twenty two states that were evenly divided between slave and free. The admission of Missouri as a slave state would upset the balance. And when it was being organized as a territory, representatives of New York proposed a law that would have ended slavery there but it was denied, similar as happened in the Arkansas territory.

C). The Southern half should permit slavery, and the northern half should be free