Question: was czechoslovakia part of the league of nations

Answer: Yes, 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Rica (22 January 1925), Brazil (14 June 1926), the Empire of Japan (27 March 1933) and Germany (19 September 1933) had withdrawn and only Egypt was left to join (on 26 May 1937).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.