During the United States occupation of Haiti, Auguste Nemours wrote his "Histoire Militaire". He also was part of the unpopular occupation government of Louis Borno, serving as Conseiller d'Etat from 1918-1922, Secretary and President du Conseil d'Etat from 1922 to 1925, and Minister Plenipotentiary to Paris from 1926 to 1930. From 1928 to 1929 he was concurrently accredited to the Holy See.