Final answer:
Seven southern states had seceded from the Union within three months of Lincoln's election.
Step-by-step explanation:
Seven southern states had seceded from the Union within three months of Lincoln's election. These states were South Carolina, Mississippi, Florida, Alabama, Georgia, Louisiana, and Texas. They seceded due to their disagreement with Lincoln's anti-slavery stance and fear of losing their economic control.
Learn more about States seceding from the Union