門戸開放政策
Millard has been described as an Open Door Realist, advocating passionately the view that the Open Door Policy in China, which upheld Chinese territorial and administrative integrity and advocated no interference with the free use of the treaty ports within their spheres of influence in China, should be backed by American military force as necessary. For Millard, the Open Door Policy involved the establishment of an American economic protectorate over China. Soon after the armistice of 1918 Millard strongly urged the United States to take an active and leading part in the reconstruction of China. Millard warned that "our Eastern policy will not be respected until the world is convinced that failure to consider and meet our reasonable wishes carries a probability of war".