The methods of modern warfare and its wide deployment of forces make effective communications one of the vital elements of victory. In the higher levels of command in the Army this is the responsibility of the Signal Corps. Actually, war laid far greater demands on Signal troops and equipment than the War Department had anticipated, and the rapid development of electronic devices continued to multiply these demands. For this reason, rather than through any fault of its own, the Signal Corps was perhaps the least ready of the technical services for the missions assigned to it after Pearl...