League of Nations

The Covenant forming the League of Nations was part of the Treaty of Versailles and came into force in

1920.

Given the times and the parties involved, membership was turbulent. Following are the countries with the year they joined (details of leaving and/or returning not given here)

1919

• Argentina
• Belgium
• Bolivia
• Brazil
• British Empire
• United Kingdom
• Australia
• Canada
•  India
• New Zealand
• South Africa
• Chile
• Republic of China
• Colombia
• Cuba
• Czechoslovakia 
• Denmark
• El Salvador
• Free France
• Greece
• Guatemala
• Haiti
• Honduras
• Kingdom of Italy
• Empire of Japan
• Liberia
• Netherlands
• Nicaragua
• Norway
• Panama
• Paraguay
• Persia/Iran
• Peru
• Poland
• Portugal
• Romania
• Siam
• Spain
• Sweden
• Switzerland
• Uruguay
• Venezuela
• Yugoslavia

1920

• Austria
• Bulgaria
• Costa Rica
• Finland
• Luxembourg
• Albania

1921

• Estonia
• Latvia
• Lithuania

1922

• Hungary

1923

• Irish Free State
• Abyssinia

1924

• Dominican Republic

1926

• Germany

1931

• Mexico

1932

• Turkey
• Kingdom of Iraq

1934

• Union of Soviet Socialist Republics
• Afghanistan
• Ecuador

1937

• Kingdom of Egypt