How did the Missouri Compromise help cause the Civil War?

Use a sentence starter and write at least 2 sentences.
The Missouri Compromise helped to cause the Civil War by....
The Missouri Compromise was part of starting the Civil War because...

The Missouri Compromise helped to cause the Civil War by intensifying sectional tensions between the North and the South over the issue of slavery. This compromise allowed for the admission of Missouri as a slave state and Maine as a free state, but it also established a line dividing future territories into those that allowed slavery and those that did not, leading to increased conflict and ultimately the outbreak of the Civil War.