The most gigantic and destructive clash between nations that the world has ever known, ended almost symbolically with the atomic explosion as a last and tragic tombstone, examined day by day, on all fronts, since 1st September, 1939, to the disarmament of the last Japanese units in October 1945. A meticulous work of historiographical research, reconstruction and endless cross-checks. The turning points, both military and political, economic, industrial, technological and psychological, updated to the latest available state-of-the-art of historical research. Economical, statistical and industrial data never before condensed and reported in such a comprehensive synthesis. An index of names of rare completeness and detail. From the historiographical point of view, an unprecedented work between the retrospective chronology and the encyclopedic dictionary.