Sectionalism Unmasked is a historical book written by Henry Edwin Tremain in 1907. The book delves into the issue of sectionalism in the United States during the 19th century, particularly leading up to the Civil War. Tremain argues that sectionalism, or the loyalty to a particular region over the country as a whole, was a major factor in the tensions between the North and South that ultimately led to the Civil War. He examines the political, economic,...