We were supposed to have, but never had, ninety days' routine supplies in France for all our forces in France. Of these forty-five days were to be in the warehouses at the base ports. Sometimes trains were loaded at the ports and run straight through to the front. Normally, there were three changes in transit. At our service were all the arterial railroads of central France, and all the locomotives and cars that the French could spare, and all the broken-down French rolling stock which our mechanics could repair. Possibly no denial can ever overtake the report that we built a railroad clear across France; but we did nothing of the kind, and contemplated nothing of the kind. We built spur tracks and sidings and cut-offs; if all the track we laid, figured a statistician in G-4 at Chaumont, had been in line, it would have reached from Saint-Nazaire across France and Germany to the Russian frontier. All our building construction, if it had been concentrated in one standard barrack building, would extend from Saint-Nazaire as far as the Elbe river in Germany. We erected and put in operation 18,543 American railroad cars, and 1,496 American locomotives. Besides producing enough firewood to form an unbroken wall around three sides of France, one meter high and one meter broad, we sawed 189,564,000 feet of lumber, 2,728,000 standard gauge ties, 923,560 narrow gauge ties, and 1,739,000 poles and pit props. If all the motor vehicles we brought to France were put end to end, they would form a convoy two hundred and ninety miles in length. On the day that the armistice was signed we were operating 1,400 miles of light railway, of which 1,090 miles had been captured from the Germans. They handled 860,652 tons of material. These figures, put together in a paragraph in passing, give an idea of the magnitude of the business which the army of the S. O. S. was conducting. It was an army which knew no excitement in war except work. The problem of sea transport which faced our ports at home was no more trying than the problem of railroad transport from our ports in France; _liaison_ between combat units in action no more trying than the _liaison_ between our American railroad men with their American training and the French railroad system. We were used to long distances and long hauls; the French, in a country no larger than some of our states, were used to short distances and short hauls. Impatient at first with their methods, we saw how they had come to be applied in France. Amazed at first at ours, the French came to appreciate how well our long heavy trains suited the wholesale business of war. The French seemed unsystematic, yet their worn locomotives and rickety cars managed to carry on an enormous traffic. When we applied our home tracer system for the first time on the railroads of France, the central offices might know the location of every car under their authority.