<P> 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 Nations . </P> <P> The League's greatest extent was from 28 September 1934 (when Ecuador joined) to 23 February 1935 (when Paraguay withdrew) with 58 members . At this time, only Costa Rica (22 January 1925), Brazil (14 June 1926), the Empire of Japan (27 March 1933) and Germany (19 September 1933) had withdrawn and only Egypt was left to join (on 26 May 1937). The members (listed from earliest joining and alphabetically if they joined on the same day) at this time were Argentina, Australia, Belgium, Bolivia, the British Empire, Canada, Chile, China, Colombia, Cuba, Czechoslovakia, Denmark, El Salvador, France, Greece, Guatemala, Haiti, Honduras, India, Irish Free State, Ethiopia, Italy, Liberia, the Netherlands, New Zealand, Nicaragua, Norway, Panama, Paraguay, Persia / Iran, Peru, Poland, Portugal, Romania, Siam, Spain, Sweden, Switzerland, the Union of South Africa, Uruguay, Yugoslavia, Venezuela, Austria, Bulgaria, Finland, Luxembourg, Albania, Estonia, Latvia, Lithuania, Hungary, Ireland, the Dominican Republic, Mexico, Turkey, Iraq, the Union of Soviet Socialist Republics, Afghanistan, Syria and Ecuador . </P> <P> Of the 42 founding members, 23 (or 24, counting Free France) remained members until the League of Nations was dissolved in 1946 . A further 21 countries joined between 1920 and 1937, but 7 left, withdrew or were expelled before 1946 . </P>

Was czechoslovakia part of the league of nations