A total of 63 countries became member states of the League of Nations

Between 1920 and 1939, a total of 63 countries became member states of the League of Nations. The Covenant forming the League of Nations was included in the Treaty of Versailles and came into force on 10 January 1920, with the League of Nations being dissolved on 18 April 1946; its assets and responsibilities were transferred to the United Nations.