Sectionalism was a major part of the events led to the Civil War. What does sectionalism refer to?

Sectionalism refers to the loyalty or devotion to a specific region or section of a country, often at the expense of national unity. In the context of the pre-Civil War United States, it highlighted the growing divide between the North and South, primarily over issues such as slavery, economic interests, and cultural differences. This regional allegiance fueled tensions and conflicts that ultimately contributed to the outbreak of the Civil War.