"'These famous memoirs are an inextricable mixture of invaluable and colorful stories of army life-and of howling cock-and-bull inventions. Marbot saw much service. He was aide-de-camp to Bernadotte, Lannes, Augereau, and Massena, and commanded a cavalry regiment in 1812-1813. Even some of his biggest whackers must have a small basis in truth-few Frenchmen have challenged them-possibly because they, too, had wonderful old-soldier stories to tell."
The stories should be generally taken with a large salt pill, like the story of the eagle at Eylau, but they also give a good picture of the duties and functions of an aide-de-camp. As a regimental commander of the 23d Chasseurs a Cheval in Russia and Saxony, I would recommend paying attention to those sections (Marbot also commanded the 7th Hussars in 1815 and was wounded). His care of his beloved chasseurs in Russia is noteworthy and is probably generally accurate.
He did, as Henry V said, however, remember with advantages.