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When did Estonia, Latvia, and Lithuania join the League of Nations?

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Map of the Baltic States-Estonia, Latvia, and Lithuania-showing country borders, major uplands and plains, highest points, and the capitals Tallinn, Riga, and Vilnius. Surrounding countries and bodies of water, including Russia, Belarus, Poland, Finland, Sweden, the Baltic Sea, and the Gulf of Finland, are also labeled. — Baltic states The Baltic states: Estonia, Latvia, and Lithuania.

Estonia, Latvia, and Lithuania all joined the League of Nations on September 22, 1921. By this date, all three Baltic states had been recognized as members of the international community.123