"This 1941 manual sets forth the nature, types, and purposes of aerial photography with its application to military requirements. The Air Corps functions with respect to aerial photography and the factors affecting the execution of these function...
This manual prescribes the duties to be performed in the service of the piece by the personnel normally assigned to one howitzer section of the firing battery.
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...
FM 6-65, Field Artillery Field Manual, Service of the Piece 75-mm Gun, M1917A1, Truck-drawn, is published for the information and guidance of all concerned.
United States Army A.E.F. (1917-1920) Artillery School (Saumur)
In order to see, think and act, an army needs a nervous system of lines of information running from the seat of government ot the listening posts extending even into the enemy territory. Wherever this system breaks down, the army will be...
"This 1939 manual prescribes the duties to be performed in the service of the piece by the personnel normally assigned to one gun section of the firing battery."