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In page Henry L. Stimson:

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In 1930-31, Stimson was the Chairman of the U.S. delegation to the London Naval Conference of 1930. In the following year, he was the Chairman of the U.S. delegation to World Disarmament Conference in Geneva. That same year, the United States issued the "Stimson Doctrine" as a result of the Japanese invasion of Manchuria: the United States refused to recognize any situation or treaty that limited U.S. treaty rights or that was brought about by aggression. Returning to private life at the end of Hoover's administration, Stimson was an outspoken advocate of strong opposition to Japanese aggression.