Volume 20 of the Revolutionary War Series covers 8 April to 31 May 1779. As it begins, Washington is gathering intelligence in preparation for a summer expedition against the Iroquois Confederacy. After considering various intelligence reports compiled with the help of scouts and spies, he issued comprehensive orders to the expedition's commander, Major General John Sullivan, laying out his plan of campaign. At the same time, Washington viewed with concern the worsening situation in the south, where the British had captured Savannah, Georgia, and were pressuring Charleston, South...