1918 was really a victory of attrition for the BEF (British Expeditionary Force) so that manpower was key. Perhaps a-revitalized GHQ leadership was crucial. May be the whole BEF had simply become more efficient, with army, Corps and divisional commanders and improving. The book throws very light on debate over traditional versus mechanical warfare, the war of movement, command and technology in alliance, ambiguity and complacency etc.