With class Danton, the French Navy launches in 1911, six battleships whose novelty is the propulsion turbines but, unlike the Dreadnought type, still endowed with a bi-caliber weapons. That, for their critics, coupled with a major flaw defects greatly exaggerated. In this comprehensive book, despite the rarity of certain records and widely illustrated with photographs often unpublished, the authors have worked to restore truth to reconsider these buildings proved the robustness of their construction in the 1st World War and the high quality their artillery until 1940 when the case of Dakar.