American Military History, Volume 1

In the summer of 1780 the American cause seemed to be at as low an ebb as it had been after the New York campaign in 1776 or after the defeats at Ticonderoga and Brandywine in 1777. Defeat in the south was not the only discouraging aspect of patriot affairs. In the north, a creeping paralysis had set in as the patriotic enthusiasm of the early war years waned. The Continental currency had depreciated virtually out of existence, and Congress was impotent to pay the soldiers or purchase supplies. At Morristown, New Jersey, in the winter of 1779–1780, the army suffered worse hardships than at Valley Forge. Congress could do little but attempt to shift its responsibilities onto the states, giving each the task of providing clothing for its own troops and furnishing certain quotas of "specific supplies" for the entire Army. The system of specific supplies worked not at all. Not only were the states laggard in furnishing supplies, but when they did it was seldom at the time or place they were needed. This breakdown in the supply system was more than even General Greene as Quartermaster General could withstand; in early 1780, under heavy criticism in Congress, he resigned his position.

Arnold's treason in September 1780 marked the nadir of the patriot cause.