Arnold began planning to capitalize financially on the change in power in Philadelphia, even before the Americans reoccupied their city. He engaged in a variety of business deals designed to profit from war-related supply movements and benefiting from the protection of his authority. Such schemes were not uncommon among American officers, but Arnold's schemes were sometimes frustrated by powerful local politicians such as Joseph Reed, who eventually amassed enough evidence to publicly air charges against him. Arnold demanded a court martial to clear the charges, writing to Washington in May 1779: "Having become a cripple in the service of my country, I little expected to meet ungrateful returns".