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In page Eugène Viollet-le-Duc:
"Annals of a Fortress strongly influenced French military defensive thinking. Viollet-le-Duc's critique of the effect of artillery (applying his practical knowledge from the 1870–1871 war) is so complete that it accurately describes the principles applied to the defense of France until World War II.[citation needed] The physical results of his theories are present in the fortification of Verdun prior to World War I and the Maginot Line prior to World War II. His theories are also represented by the French military theory of "Deliberate Advance", which stresses that artillery and a strong system of fortresses in the rear of an army are essential.
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