Another entry in the excellent Modern War Studies series of the University Press of Kansas, this volume examines in detail what Allied intelligence learned from the intercepted communications of Japan's ambassador to Hitler. Having broken the cipher that the extremely well-connected General Oshima used to communicate home, American signals intelligence gained insight into a host of important strategic matters, including the fortification of Hitler's West Wall and conditions on the Eastern Front. Conceivably they might have learned more: Boyd suggests that a careful perusal of the Oshima traffic would have warned the Allies of the impending Ardennes offensive in December 1944. A careful monograph, rather focused for the general reader, but of considerable interest to students of intelligence and the Second World War.
Get the best of Foreign Affairs' book reviews delivered to you.
More Reviews on Military, Scientific, and Technological From This Issue