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| Share | Cite. League of Nations, former international organization, established by the peace treaties that ended World War I. Like its successor, the United Nations, its purpose was the promotion of international peace and security.eague of Nations, former international organization, established by the peace treaties that ended World War I.
The League of Nations (abbreviated as LN in English, La SociÃ©tÃ© des Nations abbreviated as SDN or SdN in French) was an intergovernmental organisation founded on 10 January 1920 as a result of the Paris Peace Conference that ended the First World War. It was the first international organisation whose principal mission was to maintain world peace.