The answer is to secure the boulders
Answer:
I'm pretty sure that is the west half of them were anti-slavery and the other half was pro-slavery. So what they did was the western territory got divided into two parts the parts that apposed it and the parts that supported it. Also some of the new states that joined could vote on whether they wanted to be a slave state or not. I forget which ones, hope this helps.
Explanation:
