General Berthaut was sub-chief of the French General Staff, and director of the geographical service, from 1903 to 1912; and his defence of the ideas prevailing up to the eve of the war deserves careful reading, unsatisfying as it may be found on many points. It is mainly intended to justify the Eastward concentration, and to controvert those who think the business of an army is to defend the national territory foot by foot. The general appeals to the weight of military authority (which, as we shall see, is less one-sided than he suggests): “From 1875 to 1914, we had 40 Ministers of War; we changed the Chief of Staff sixteen times; changes were still more numerous among sub-chiefs of Staff, heads of bureaux and services. Several hundred officers of all arms, returning periodically to their regiments, contributed to the Staff work of the army. Yet the directive idea of our defence never varied. Such as it was in 1876, so it was revealed in 1914.” Throughout this time, concentration was foreseen and prepared behind the upper courses of the Meuse and Moselle with a view to positions being held in the upper valleys of the Marne, Aube, and Seine. The idea that the French eastern frontier was infrangible, General Berthaut considers “extremely exaggerated.” If it had not been adequately held, the Germans would have turned thither from the north. The violation of the neutrality either of Switzerland or Belgium was, however, beyond doubt. To cover the whole frontier was impossible; and, “incontestably,” the armies had to be turned in one mass toward the east. Trenches are “an effect, not a cause, of the stabilisation of fronts.” The general has a very poor opinion of fortresses, the only one to which he attributes great importance being Metz! Liège was “a practically useless sacrifice”; Maubeuge “stopped nothing.” These opinions seem to the present writer untenable; and General Berthaut admits that the reaction against fortification “went too far” (p. 182). He may be said to damn the three French offensives with faint praise. The move into Alsace “could not be of any military interest,” and was “a political affair.” The Lorraine offensive was “necessarily limited,” as a distant objective could not be pursued between Metz and Strasbourg. As to Charleroi, France was bound to make a demonstration on behalf of Belgium and “to satisfy public opinion.” Much of General Berthaut’s apologia is vitiated by his assumption that France had necessarily to face a superiority of force.