The importance assumed by trench warfare and the progress made in the application of field fortification and in the science of the attack and defense of elaborate systems of trenches, have rendered necessary special instruction in the details of...
"Wire is one of the principal means of communication for all field artillery except mechanized and antitank artillery. It consists of telephone or telegraph communication. All other means augment and supplement wire."
United States Air Corps Tactical School (Langley Field)
"The scope of this 1927 course in Antiaircraft Defense as taught at this school is to familiarize Air Corps commanders with the capabilities and limitations of the antiaircraft Service, and to assure coordination and cooperation between the Air...