| Restored WWI French Train |
The First World War began and ended on rails. The mobilizations of the powers were accomplished with thousands of trains moving troops to their jump-off points. The fighting ended with the Armistice signed in Marshal Foch's private rail coach in a clearing in Compiegne Forest.
In between, the rail networks were essential for sustaining the fronts during the long period of trench warfare, and for assembling the shells, food and stores for launching the great battles like the Somme. The Miracle of the Marne turned on Joffre's superior use of rail to re-array his forces. Verdun was sustained during the great 1916 assault by a light-rail line paralleling the Voie Sacrée. And when the great rollback of the Western Front occurred in 1918, the Allies staged their battles either to protect their own lines such as at Amiens and St. Mihiel or to attack the German network as in the Meuse-Argonne Offensive, which successfully closed the strategic Metz-Sedan-Mézières line.
For all that is written about the tactical excellence of the German Army, it is not an exaggeration to say that the Allied leaders consistently showed a higher appreciation of the importance of railroads for their armies throughout the war.
| A Comparable Union Army Train from the Civil War |
19th Century Roots
The military use of railways was one of the most influential technological changes in warfare in the second half of the 19th century. Railways made possible rapid movement of large masses of troops and equipment; the correspondingly shortened transit times reduced feeding and billeting requirements; troops and horses arrived in relatively fresh condition; and improved logistical support made possible the sustainment of mass conscript armies in the field. One of the earliest operational uses of military railways occurred in 1849, when a Russian corps moved from Warsaw to Vienna to protect the city from Hungarian rebels. During the American Civil War, two Union corps—more than 20,000 troops, their equipment, and horses—moved 1,230 miles by rail in just eleven days in September 1864.
Moltke made a careful study of the lessons of the American Civil War, and in 1870 the Germans made far more effective use of their rail system than the French did of theirs. All the European countries quickly developed dense rail networks, and the general staffs of all nations tirelessly studied how to put this strategic resource to best use, when war came again.
| German Troop Depot, Western Front |
20th-Century War
From the outbreak of World War I, railroads were the key means of logistical support and it also played a role in what operational mobility was achieved on the Western Front. As the fronts developed both sides developed dense rail network behind their lines. Generally, it is difficult to close down, or even temporarily neutralize a rail network.
While it is relatively easy to destroy signaling and switching equipment, that only slows down but does not stop rail movement. The roadbeds and track are much harder to destroy. The key vulnerabilities in a rail network are its choke points; tunnels, bridges, switching yards, and rail junctions. If a rail network is dense, single choke points generally have little military significance, because the system has ample bypasses and workarounds. For much of the war, planners focused on protecting their lines or, in some cases, driving the opposition away from key lines to prevent interdicting fire.
| British Tanks Moving to the Front, 1918 |
Targeting Railroad Networks
It was not until the Western Front became fluid again in the Spring of 1918 that breaking the enemy's rail network became offensive objectives. The U.S. Meuse-Argonne Offensive, as mentioned above, successfully cut the main German line supplying all its forces along the southern Western Front. However, on the Flanders to Paris stretch of the Western Front the German system had far greater depth, very few if any significant choke points, and it ran straight back to the national base without having to link into seaports. Facing them, the British position in Flanders and the old Somme sector was not robust and had two significant choke points— its two major forward marshaling and switching yards at Amiens and Hazebrouck. Ludendorff's spring offensives failed to secure either of these locations. The British Army survived and was able to resume the offensive in August 1918. We will have more on this particular situation and why it might have constituted one of the great missed opportunities for the German Army in future postings on Roads to the Great War.
Source: Relevance, Fall 2011
