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A number of secessionist movements have arisen in the United States since its formation in 1776. Indeed, the very independence of the country is the result of its secession from the British Empire. By far the best known postindependence secessionist movement was the one that created the Confederate States of America and led to the American Civil War (1861–65). However, various secessionist movements waxed and waned during the period between independence and the Civil War....