 Complete the following phrase:  While respected internationally, the Open Door Policy was ignored by Russia and Japan when they encroached in Manchuria. The U.S. protested Russias actions. Japan and Russia fought the Russo-Japanese War in 1904, in which the U.S. mediated a peace. Japan also presented a further challenge to the policy with its Twenty-One Demands in 1915 made on the then-Republic of China. Japan also made secret treaties with the Allied Powers promising Japan the German territories in China. In 1931, Japan 