In the next place troubles with the personnel were no less acute than those with the matériel. In proportion as the Germans advanced towards Paris the bulk of the French population retired, while threats and offers of liberal pay alike failed to secure from those who remained assistance either in repairing or in operating the lines of which the invaders had taken possession. In these circumstances not only engines, carriages and wagons, but no fewer than 3,500 railwaymen—in addition to the German Railway Troops already in France—had to be brought from Germany. Yet even the resort to this expedient started a fresh lot of troubles. The railwaymen so imported had been in the service of different German railway companies whose equipment and methods of operation varied considerably; so that when the men were required to work together—and that, also, on the lines of a foreign country, with the accompaniment of much laxity in discipline as well as of much mutual misunderstanding—a vast amount of friction arose.

All these experiences emphasised and strengthened the conclusion arrived at even before the campaign of 1870-71—that the real efficiency of Railway Troops can only be obtained by organising them in time of peace in readiness for times of war. Such conclusion being now beyond all possible dispute, action was taken by Prussia with characteristic promptness.

In accordance with a Royal Order of May 19, 1871, there was added to the Prussian Army, on October 1 of the same year, a Railway Battalion ("Eisenbahnbataillon"), the special purposes of which were (1) to afford to those constituting it the means of obtaining, in time of peace, such technical training as would enable them to construct any railway works necessary in time of war, to repair promptly any damage done to railways, and to undertake the entire railway traffic along lines of communication; (2) to procure, or prepare, in time of peace, all plant, materials, tools, etc., likely to be required in time of war; and (3) to constitute the nucleus of all necessary railway formations in war. The Battalion was formed of non-commissioned officers and men of the now disbanded sections of Railway Troops who were still liable to military service, supplemented by three-year volunteers and recruits from all parts of the territory subject to the Prussian Minister of War, only those being accepted, however, whose previous occupations fitted them for one or other of the various grades of railway work. The officers were obtained mainly, though not exclusively, from the Engineers. Members of that corps, together with others who were mechanical engineers by profession, were accepted as one-year volunteers.

On a peace footing the Battalion was composed of a Staff and four Companies, each of 100 or 125 men, with a depôt, and provided with its own means of transport. One of the Companies consisted exclusively of platelayers and watchmen. On mobilisation each Company was to be enlarged into two Construction Companies and one Traffic Company, giving a total, on a war footing, of eight Construction and four Traffic Companies. The Corps also had a reserve division consisting of a Staff, two Companies and a section of railway employés. All officers having railway experience who had served in the war of 1870-71 were included in the reserve.

The training of the Battalion was under the direction of the Inspector-General of the Engineers Corps. It comprised (1) theoretical and scientific instruction of the officers in all branches of railway construction, repair and destruction, coupled with the study of every branch of railway science likely to be of advantage in military transport, while special importance was attached to a close and constant intercourse with the staffs of the various railways, and (2) practical experience of railway construction and operation. This experience was afforded (a) on the Battalion's practice grounds, where instruction was more especially given in the art of rapidly destroying railway track; (b) through the employment of the men—subject to the continued maintenance among them of the principle of a military organisation—on many of the private as well as on the State railways in Germany, such employment including the repair of bridges, the laying of track, the enlargement of stations, etc., and (c) by the construction, operation and management of a short line of railway which, on completion, was devoted to the public service. The period of training was for either one or three years and the Battalion was kept up to a normal standard of about 500 men by a succession of recruits. These recruits were generally men of a good type, admission to the Battalion being regarded with the greater favour inasmuch as the experience gained was found to be of advantage to the men in obtaining railway employment on their return to civil life.

In the giving of this practical instruction the purpose specially kept in view was that of anticipating as far as possible actual war conditions, and providing for them accordingly. Thus in the laying of rails for any new line built by the Railway Troops great importance was attached to the speed with which the work could be done, the records of the time taken being very closely watched.

To one group of officers was allocated the duty of studying all developments in railway science and operation at home or abroad and conveying information thereon to those under instruction. A further important feature of the scheme included the publication of a series of textbooks on railway subjects regarded from a military standpoint. A beginning was also made with the collection of large supplies of rails, bridge materials, etc., for use as required.

In December, 1872, Bavaria created a similar Battalion, comprising a single Company attached to the 1st Bavarian Corps. The constitution and the operations of this Battalion followed closely the precedents established by Prussia.

Such was the importance attached by the highest military authorities in Germany to the formation of these Railway Troops that the Chief of the Great General Staff was their Inspector-General from the time of the first Prussian Battalion being created down to the year 1899.

In December 30, 1875, came the conversion of the Railway Battalion into a Railway Regiment. It was felt that the cadres of the former did not respond sufficiently to the needs of the military rail-transport situation, and they were accordingly enlarged into a Regiment of two Battalions, with a regimental Staff of forty-eight, and 502 men in each Battalion. In 1887 the Prussian Regiment was increased from two Battalions to four, and the Bavarian Battalion expanded to the extent of two companies in place of one. In 1890 the Prussian Regiment further became a Brigade of two Regiments, each of two Battalions, the number of units thus remaining the same as before; though in 1893 the Prussian Brigade was augmented by two more Battalions, increasing its force to three Regiments, each of two Battalions with four Companies in each Battalion, or a total of twenty-four Companies, of which one was a Würtemberg Company and two were Saxon Companies, while the Bavarian Battalion acquired three Companies in the place of two.