The following review of events was completed on the 6th February, 1918. The books which have since been published on the period dealt with, such as Major Bircher's valuable contribution on the Battle of the Marne, that of Field-Marshal French (which appeared in the summer of 1919), and General Maurice's Forty Days in 1914, have not been taken into account. The temptation to enter into the controversies raised by General Baumgarten-Crusius's work has been avoided, although it undoubtedly contains facts of great importance; so also with the books of Field-Marshal von Büllow and General von Hausen. Only opinions formed at the time are recorded; those arrived at later have been omitted.These limitations seem most necessary in order that the appreciation of the situation as it appeared to the headquarters of the First Army in 1914 may be recorded, unaffected by other influences. With this in view, the more important orders and documents have been reproduced verbatim in the text.The point of view of the Army Commander as regards the dangers of a crossing of the Marne at the beginning of September, 1914, is set forth in the third part of this review. Major-General v. Nordenswan, a Swede, has made many apposite remarks in his book Strategisches aus dem Weltkriege, and has developed them as much as the information at his disposal allowed.
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