The Revolutionary War was nearing its end in early 1783. In his Hudson Highlands stronghold, General Washington kept a wary eye on the British force in New York City, 60 miles away. His soldiers, owed months of back pay and promised pensions, chafed under martial authority. A nationalist faction in Congress seized upon this discontent to instigate the Newburgh Conspiracy, a plot by Continental Army officers to menace civil officials who opposed the Impost, a 5% tax on imports to be collected by the central government, to satisfy the nation's debts. The army--by this time a formidable force...