In 1791, in an attempt to relieve debts incurred during the Revolutionary War, George Washington levied the first American tax on spirits—and Pennsylvania's Scottish-Irish and German farmers, who had made whiskey from rye for decades, refused to pay. Riots ensued, leading to the first-ever dispatch of federal troops to curb a domestic disturbance. This so-called Whiskey Rebellion also sent many of the tax protesters packing, headed south on the Ohio River. When they landed in Kentucky County, they found pristine, iron-free water flowing over limestone creek beds, and plenty of corn—which they quickly realized made good whiskey. By 1820, Kentucky was exporting 2,000 barrels a year of corn spirits, mostly loaded onto flatboats where the Ohio and Kentucky Rivers meet, in what was then Bourbon County. Eventually, customers started asking for the whiskey by name.