An international organization formed in 1920 to promote cooperation and peace among nations; although suggested by Woodrow Wilson, the United States never joined and it remained powerless; it was dissolved in 1946 after the United Nations was formed WordNet 3.0 & Open English WordNet

The League of Nations was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. Wikipedia

20th-century intergovernmental organisation, predecessor to the United Nations Wikidata

An international organization founded as a result of the Treaty of Versailles, which ended the First World War. Its goals included disarmament, preventing war through collective security, settling disputes between countries through negotiation, diplomacy and improving global quality of life. The predecessor of the United Nations. Wiktionary

International organization. Wiktionary (translation)