Book excerpt: The Japanese conquest of the Pacific comprised of a complex series of widely scattered operations; their intent was to neutralize American, Commonwealth, and Dutch forces, seize regions rich in economic resources, and secure an outer defense line for their empire. Although their conquest was successful, the forces deployed from Japan and China were not always ideally trained, equipped and armed. The South Seas and tropics proved challenging to these soldiers who were used to milder climates, and they were a less lethal enemy on the Chinese mainland. This book examines the overall structure of the Imperial Japanese Army (IJA), the forces in existence at the beginning of World War II and the organization of the forces committed to the conquest of the Pacific.