Original sentence: His military genius is undeniable, and he was as far superior to the mere theorist as Lannes and Davout were to the pure divisionaire or "fighting" general.Much of his time in his last years was spent upon his Mémoires, which are of great value for the military history of his time
Edited sentence: But his military genius is undeniable, and he was as far superior to the mere theorist as Lannes and Davout were to the pure divisionaire or "fighting" general.His strategy indeed tended to become pure virtuosity, and his tactics, though neat, appear frigid and antiquated when contrasted with those of the instinctive leaders, the fighting generals whom the theorists affect to despise.Much of his time in his last years was spent upon his Mémoires, which are of great value for the military history of his time, though they must be read as a personal defence of himself in various junctures rather than as an unbiased account of his times.They show Marmont, as he really was, an embittered man, who never thought his services sufficiently required, and above all, a man too much in love with himself and his own glory to be a true friend or a faithful servant