In early 1942, Japanese military forces dominated a significant portion of the earth's surface, stretching from the Indian Ocean to the Bering Sea and from Manchuria to the Coral Sea. Just three years later, Japan surrendered, having lost most of its vast domain. Coordinated action by Allied air, naval, and ground forces attained the victory. Air power, both land- and carrier-based, played a dominant role. Understanding the Army Air Forces' role in the Asiatic-Pacific theater requires examining the context of Allied strategy, American air and naval operations, and ground campaigns. Without the surface conquests by soldiers and sailors, AAF fliers would have lacked bases close enough to enemy targets for effective raids. Yet, without Allied air power, these surface victories would have been impossible. The High Road to Tokyo Bay concentrates on the Army Air Forces' tactical operations in Asia and the Pacific areas during World War II. A subsequent pamphlet will cover the strategic bombardment of Japan.