Pierpont Stackpole, Boston lawyer, became an aide under Lieutenant General Hunter Liggett, soon to be commander of the first American corps in France of 1918. Stackpole’s diary is an eye witness account of the American Expeditionary Force’s experience on the Western Front, gaining an insight into the works od Liggett’s orders. Thus, understanding how he conducted his commands in trying and managing situations. Liggett’s success built the American Army in France during WWI with the aide of the diary. Stackpole’s diary also mentions other figures of the war including a different perspective of Major General Clarence Edwards.