Many farmers distilled their corn harvest into whiskey, increasing its value while lowering its transportation costs. At that time, whiskey was used as a form of currency on the frontier. When the federal government imposed an excise tax on whiskey, Western Pennsylvania farmers felt victimized, leading to the Whiskey Rebellion in 1794. Farmers from the region rallied at Braddock's Field and marched on Pittsburgh. The short-lived rebellion was put down, however, when President George Washington sent in militias from several states.