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

The lesson Eisenhower and his unblooded American generals learn from the Kasserine Pass debacle is that when it comes to fighting, the most valuable way to use Ultra is to supplement it by local intelligence gathered the regular way: i.e., patrols, POW interrogations, local radio intercepts, aerial photos.