All these considerations led to the inevitable conclusion that if we were to handle and supply the great forces deemed essential to win the war we must utilize the southern ports of France--Bordeaux, La Pallice, St. Nazaire, and Brest--and the comparatively unused railway systems leading therefrom to the northeast. Generally speaking, then, this would contemplate the use of our forces against the enemy somewhere in that direction, but the great depots of supply must be centrally located, preferably in the area included by Tours, Bourges, and Chateauroux, so that our armies could be supplied with equal facility wherever they might be serving on the western front. SKILLED HELP. To build up such a system there were talented men in the Regular Army, but more experts were necessary than the army could furnish. Thanks to the patriotic spirit of our people at home, there came from civil life men trained for every sort of work involved in building and managing the organization necessary to handle and transport such an army and keep it supplied. With such assistance the construction and general development of our plans have kept pace with the growth of the forces, and the Service of Supply is now able to discharge from ships and move 45,000 tons daily, besides transporting troops and material in the conduct of active operations. WORK OF THE DEPARTMENTS. As to organization, all the administrative and supply services, except the Adjutant General's, Inspector General's, and Judge Advocates General's Departments which remain at general headquarters, have been transferred to the headquarters of the services of supplies at Tours under a commanding general responsible to the commander-in-chief for supply of the armies. The Chief Quartermaster, Chief Surgeon, Chief Signal Officer, Chief of Ordnance, Chief of Air Service, Chief of Chemical Warfare, the general purchasing agent in all that pertains to questions of procurement and supply, the Provost Marshal General in the maintenance of order in general, the Director General of Transportation in all that affects such matters, and the Chief Engineer in all matters of administration and supply, are subordinate to the Commanding General of the Service of Supply, who, assisted by a staff especially organized for the purpose, is charged with the administrative co-ordination of all these services. TRANSPORTATION AND ENGINEER'S DEPARTMENT.