In the summer of 1779, British general Sir Henry Clinton launched one last attempt to gain control of the Hudson River, the most strategically important waterway during the American Revolution. The campaign involved all of George Washington's main Continental Army and most of the forces around New York City under Clinton's command, but ended without a major battle. Still, the summer saw plenty of action. American cavalry sparred with their British counterparts in eastern New York; thousands of militiamen resisted brutal British raids along the Connecticut coast; and Washington stunned the British with daring night bayonet attacks on the fortified posts of Stony Point and Paulus Hook. This study details the strategy, tactics, officers, soldiers, and spies that shaped this critical campaign, which helped set the stage for America's final victory in the Revolution.