Union of South American Nations in Mitad del Mundo, Ecuador, where the cornerstone was laid for the headquarters of the General Secretariat of the Union. In April 2018, six countries suspended membership: Argentina, Brazil, Chile, Colombia, Paraguay and Peru. In August 2018, Colombia announced its withdrawal from the organization. At the Third South American Summit on 8 December 2004, presidents or representatives from 12 South American nations signed the "Cusco Declaration", a two-page statement of intent announcing the foundation of the South American Community. Panama and Mexico attended the signing ceremony as observers in Brazil. The mechanics of the new entity came out of the
Member states of the League of Nations was the only country to be expelled by the League (in 1939, following its invasion of Finland). Despite formulating the concept and signing the Covenant, the United States never joined the League of Nations. 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. The League of Nations was dissolved on 18 April 1946, when its assets and responsibilities were transferred to the United