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
- 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
1921
1923
1926
1931
1932
1934