Marching Orders: The Untold Story of How the American Breaking of the Japanese Secret Codes Led to the Defeat of Nazi Germany and Japan

by Bruce Lee

What McCormack discovers is that in 1940–41 the code breaking is being done “almost exclusively” by the military. Much of the work is done by the Army, which is responsible for military and military/analysis traffic, including “the large residual field that is loosely called ‘diplomatic.’” According to McCormack this means that during the war, the Army is not dependent upon the State Department for its information. On the contrary, the Army controls