Six months after the Declaration of Independence, the American Revolution was all but lost. A powerful British force had routed the Americans at New York, occupied three colonies, and advanced within sight of Philadelphia. George Washington lost ninety percent of his army and was driven across the Delaware River. Panic and despair spread through the states. Fischer's richly textured narrative reveals the crucial role of contingency in these events. We see how the campaign unfolded in a sequence of difficult choices by many actors, from generals to civilians, on both sides. While British and German forces remained rigid and hierarchical, Americans evolved an open and flexible system that was fundamental to their success. At the same time, they developed an American ethic of warfare that John Adams called "the policy of humanity," and showed that moral victories could have powerful material effects. The startling success of Washington and his compatriots not only saved the faltering American Revolution, but helped to give it new meaning, in a pivotal moment for American history.