The Civil War is the war where Americans fought against each other. It lasted from 1861-1865 between the Northern states and Southern states. Causes of the Civil War include state’s rights, sectionalism, and slavery. Americans were separated in their beliefs which is called sectionalism. In the beginning, there was a compromise between the north and south called Missouri Conpromise. It was an agreement where Maine was created as a free state, Missouri was a slave state, and slavery was not allowed in new states north of Missouri.