 Bugeaud's experiences with Marshal Suchet, a highly regarded former general of Napoleon's, left an indelible impression upon the Marshal that were handed down to du Picq.Marshal Bugeaud's aide de camp, Louis Jules Trochu, provided another inspiration with his work "L'Armée Française en 1867", in which Trochu emphasized psychological difficulties in warfare.His principal interest was in the moral and psychological aspects of battle; as he himself wrote of the battlefields of his day