Although, upon our entry into the European war, preparations were immediately begun for the complete motorization of the various trains—ammunition, engineer, sanitary, and supply—which comprise the divisional trains, each of these sections was still controlled by the corps or department to which it pertained. In other words, the ammunition trains were controlled by the Ordnance Department so far as the procurement of vehicles and the supply of personnel was concerned; the engineer trains were under the control of the Corps of Engineers; the sanitary trains were under the Medical Corps, and only the supply trains came under the jurisdiction of the Quartermaster Corps. It must be understood, however, that the divisional trains were assigned to and became a part of the division itself, being, therefore, under the direct command of the divisional commander. As might have been expected, this system resulted in inefficiency and confusion because of municipal officers in control. Instead of all motor activities being directed by a single head, each of the staff departments using motor vehicles had its own ideas and worked along its own lines. Thus, the Corps of Engineers had designed and was manufacturing various types of vehicles adapted to engineering work. The Signal Corps was producing vehicles designed for carrying radio equipment, photographic laboratories, and the like. The Medical Corps was experimenting with various types of ambulances, dental wagons, and mobile laboratories, while the Ordnance Department was dividing its allegiance between the tractor type and the model known as the “Quad” or four-wheel drive. Thus it was that for many months after the declaration of war the motor activities of the army were distributed among several arms of the service, with the inefficiency and duplication of effort which invariably results from decentralization.