Glen Williford lends new insight to the reasons for America’s relatively quick comeback from the attack on Pearl Harbor. For the first time, he tells the complete story of American efforts to build and reinforce its Pacific garrisons in the Philippines and Hawaii during the six months prior to the war and to supply Bataan and Corregidor in early 1942. One effort involved a carefully organized convoy and air ferry routes that were reaching their heights in December 1941. The author fully describes the reinforcement efforts in the context of both the existing military strategies and the realities and physical limits of America’s defense capabilities at the time. It concludes with an examination of the transition from the desperate defensive efforts to protect lines of communication to Australia and build a major base there to using these assets to resume the offensive.