Answer:
In simple words, a collection of slave owning territories wanted to become states so they sent in an "Admission to the Union Request Corundum"
Explanation:
Lost story short a requirement was to prolong no use of slaves in order for them to be a "Free Union" Â opposed to the British the Southern states didn't want to lose power in the economic trade since the big source of income was cotton and tobacco so they seceeded from the territories and became the confederate state , this later led to the civil war to win back the confederate state under the Union. A big WHY? in this topic is why didn't we just let the Confederates rule their own state and this is because the British Empire would've captured the Confederate states while in the middle of the civil war and then they would be under British Rule again. Reasoning to why the British would do this is for more economic gain.