<span>Differences between the North and the South were readily apparent well before the American Revolution. Economic, social and political structures differed significantly between the two regions, and these disparities only widened in the 1800s. In 1861, the Civil War erupted between the two sides, and much of the conflict surrounded sectional differences. Once the war ended, Reconstruction lessened some sectional disparities but increased others.</span>
Coastline,rivers,and low elevation
Authoritative
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This type of voting is called single party voting or univote.
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The answer to that is poor working conditions and cruel treatments of peasents.