The long and bloody struggle for control of the Japanese-occupied Pacific islands during World War II is one of the most striking moments in the history of the wars of the 20th century. To counter the Allied forces, the Japanese erected numerous fortifications on the islands. These were both large concrete bunkers and small inconspicuous positions for single shooters. Gordon L. Rothmann's book details all types of fortifications on the Pacific islands, as well as the tactical principles of Japanese defense.