In the summer of 1934, a group of prominent Wall Street financiers offered $18,000 in cash to a retired Marine Corps general if he would lead a paramilitary force of a half million men to march on Washington, D.C. Their objective? To overthrow the United States government and replace Franklin Roosevelt with a dictator. General Smedley Butler refused the money, along with an offer from the heir to the Singer sewing machine dynasty to pay off his mortgage...