Military time-tables, corresponding to those in everyday use, have next to be prepared, showing exactly what trains must run from given stations, at fixed hours, by clearly defined routes, to specified destinations as soon as the occasion arises. The great aim kept in view in the compilation of these time-tables is, not alone preparation in advance, but the most complete utilisation possible of the available transport facilities of the country as a whole. A selection must also be made in advance of the stations at which troops on long journeys can obtain food, as well as of the stations to be used as depôts for stores and supplies, all the necessary arrangements being provided for. After the initial great strain on the railway resources involved in mobilisation and concentration, there will still be an enormous amount of transport to be done during the campaign. In the one direction there will be a constant despatch of reinforcements, provisions, clothing, munitions and supplies or stores to the front; in the other direction there will be a steady flow of sick and wounded, of prisoners of war, and of materiel not wanted at the front, followed by the final return home of the troops at the end of the campaign. At each important point along the lines of communication where special services in connection with the rail transport, in either direction, are to be rendered, there must be organisation of such kind as will ensure that whatever is necessary shall be done promptly and efficiently under the control of persons of recognised authority and responsibility, and without any of the friction that would, inevitably, lead to delays, traffic blocks and other complications. Nor can the same system of organisation apply to the whole line of communication, from the base to the limit of the rail service at the front. A point will be reached therein where the control, if not the actual operation, of the railway lines must needs be transferred from the civil to the military authorities, rendering necessary a scheme of supervision and working different from that which can be followed on the sections not within the actual theatre of war.