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

In 1924, a young lieutenant, thirty-one-year-old Laurence C. Safford, is ordered to head up a radio intelligence unit, and he begins building up a radio intercept network. By the late 1930s, the U.S. Navy’s cryptological organization numbers seven hundred officers and enlisted personnel (more than double the Army’s manpower), and it has listening posts (intercept stations) in Washington State,