1933. The United States announced the Stimson Doctrine, which warned Japan that areas gained by conquest would not be recognized. In the end, the Lytton Report basically served to show the weaknesses of the League of Nations and its inability to enforce its decisions. The situation was complicated by the length of time it took for the Lytton Commission to prepare its report, during which time Japan was able to firmly secure its control over Manchuria and was thus able to reject the condemnation of the League with impunity. References Further reading * Chang, David Wen-wei. "The Western Powers and Japan's Aggression in China: The League of Nations and 'The Lytton Report.'" American Journal of Chinese Studies (2003) 19#1 pp 43–63. Jin, Wensi, and Wên-ssŭ Chin. China and the League of nations: the Sino-Japanese controversy (St. John's University Press, 1965). Kuhn, Arthur K. "The Lytton Report on the Manchurian Crisis." American Journal of International Law 27.1 (1933): 96–100. in JSTOR Nish, Ian Hill. Japan's Struggle with Internationalism: Japan, China, and the League of Nations, 1931-3 (Routledge, 1993). Saito, Hirosi. "A Japanese view of the Manchurian situation." The Annals of the American Academy of Political and Social Science 165 (1933): 159–166. in JSTOR Walters, Francis Paul. A History of The League of Nations. London, UK: Oxford University Press, 1960. pg 491–492. That book is freely available on the site of the United Nations Office in Geneva online External links Full text of the report Observations of Japan to the report (from p. 88, or 8 by file's numbering) end of Japan's observations and comments by China to those observations Discussion on the report in the Assembly of the League of Nations. Part 1 Part 2 US History.com site History of Manchuria 1931 in Japan 1931 in China League of Nations 1931 in international relations 1931 documents Foreign relations of Manchukuo