Modifications To The Plan, 1906
Following the retirement of Schlieffen in 1906, Helmuth von Moltke became the German chief of staff. He disagreed with at least some of the Schlieffen Plan, thinking it to be too risky. The Plan, however, having been devised in 1905, was now too much a part of German military thinking to be abandoned completely, so all Moltke could do was modify it.
- Moltke decided to pull significant numbers of troops away from the main force entering France from the north, in order to fortify the forces in Alsace-Lorraine, and the forces at the Russian border.
- The other significant change he made was not to enter through the Netherlands, instead sending troops through Belgium and Luxembourg only.
These changes have been the subject of much debate. L.C.F Turner in 1970 described von Moltke's changes as "a substantial modification in the Schlieffen Plan and one which probably doomed the German campaign in the west before it was ever launched." Turner claims that by weakening the main German offensive, they did not have a real chance of defeating the French army quickly enough; hence they became stranded in a two-front-war. He also says that not going through the Netherlands not only created a bottleneck at the German-Belgian border, but also that not having the Dutch railways at their disposal created a huge supply problem, a problem which outweighed the benefits they gained by still having access to the Dutch ports.
However, in 1977, Martin van Creveld, analyzing the role of logistics in the plan, felt that the effects of Moltke's alteration to avoid invading Dutch neutrality were more apparent than real, since two corps of troops which had been allocated to contain the 90,000-strong Dutch Army could instead be used for the invasion of France. Further, van Creveld points out that while Schlieffen had assigned five corps for the investment of Antwerp, Moltke made do with only two. "Though it is therefore quite true that Moltke's right wing was not as strong as Schlieffen had planned to make it, this loss was more than compensated for by the economies effected in version of the plan."
Early in the war, according to the directives of Plan XVII, the French mobilized and hurled their forces towards the German border in an ill-fated attempt to recapture Alsace-Lorraine. This played exactly into Schlieffen's conception of a trap through double envelopment, which called for a loose defense of the border, and actually for retreats by which the French forces would have been lured further away from the main thrust of the German advance. However, Moltke's weakening of the German right, the defense of Alsace-Lorraine, and the transfer of three army corps and one cavalry division from the western front to help contain the Russian advance into East Prussia, all contributed to the failure of the German army to break through the Allied forces at the Marne. Without that breakthrough, the plan was destroyed.
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