As an expert in international relations and history, I have a deep understanding of the League of Nations, which was an international organization founded after World War I with the intention of maintaining world peace. The League was established on January 10, 1920, as part of the Treaty of Versailles. Its primary aim was to prevent future wars through collective security and disarmament, and to settle international disputes through negotiation and arbitration.

The League of Nations had a significant number of member states, reflecting the global nature of its mission. The members, as listed from the earliest joining and alphabetically if they joined on the same day, included a diverse range of countries from across the globe. Here is a comprehensive list of the countries that were involved in the League of Nations:


1. Argentina

2. Australia

3. Belgium

4. Bolivia

5. Brazil

6. British Empire (which included the United Kingdom and its various dominions such as Canada, Australia, New Zealand, South Africa, and Ireland)
7.
Canada
8.
Chile
9.
China
10.
Colombia
1
1. Cuba
1
2. Czechoslovakia
1
3. Denmark
1
4. Dominican Republic
1
5. Ecuador
1
6. Egypt
17.
El Salvador
18.
Estonia
19.
Finland
20.
France
2
1. Germany (joined later in 1926)
2
2. Greece
2
3. Guatemala
2
4. Haiti
2
5. Honduras
2
6. India (then a British colony, represented by the British government)
27.
Ireland
28.
Italy
29.
Japan
30.
Latvia
3
1. Liberia
3
2. Lithuania
3
3. Luxembourg
3
4. Mexico
3
5. Nicaragua
3
6. Norway
37.
Panama
38.
Paraguay
39.
Persia (now known as Iran)
40.
Peru
4
1. Poland
4
2. Portugal
4
3. Romania
4
4. Serbia, Croatia, and Slovenia (known as the Kingdom of Serbs, Croats, and Slovenes, later became the Kingdom of Yugoslavia)
4
5. Sierra Leone
4
6. South Africa
47.
Spain
48.
Sweden
49.
Switzerland
50.
Thailand
5
1. Uruguay
5
2. Venezuela
5
3. Yugoslavia (as mentioned, started as the Kingdom of Serbs, Croats, and Slovenes)

It's important to note that the United States, despite playing a significant role in the creation of the League, did not join due to the U.S. Senate's refusal to ratify the Treaty of Versailles. This was a major blow to the organization's credibility and effectiveness.

The League of Nations faced numerous challenges and was ultimately unable to prevent World War II. Its failure to maintain peace led to the establishment of its successor, the United Nations, in 1945, which aimed to address the League's shortcomings and to foster a more effective international cooperation.

The League of Nations, despite its shortcomings, was a pioneering effort in the direction of international cooperation and collective security. It laid the groundwork for many of the principles and practices that are still in place in the modern international system.

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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, Italy, Liberia, the ...read more >>