Nations[]
Sovereign States[]
- Afghanistan - Kingdom of Afghanistan
- Andorra- Principality of Andorra
- Argentina - Argentine Republic
- Australia - Commonwealth of Australia
- Belgium - Kingdom of Belgium (to May 17)
- Bolivia - Republic of Bolivia
- Brazil - Republic of the United States of Brazil
- Bulgaria - Kingdom of Bulgaria
- Canada - Dominion of Canada
- Chile - Republic of Chile
- China - Republic of China
- Columbia - Republic of Columbia
- Costa Rica - Republic of Costa Rica
- Cuba - Republic of Cuba
- Czechoslovakia - Czechoslovakia
- Danzig - Free City of Danzig
- Denmark - Kingdom of Denmark (to April 9)
- Dominican Republic
- Ecuador - Republic of Ecuador
- Egypt - Kingdom of Egypt
- El Salvador - Republic of El Salvador
- Estonia - Republic of Estonia (to June 17)
- Finland - Republic of Finland
- France - Third French Republic (to June 22)
- Vichy France - Vichy France (from June 22)
- - Third Reich
- Greece - Kingdom of Greece
- Guatemala - Republic of Guatemala
- Haiti - Republic of Haiti
- Honduras - Republic of Honduras
- Hungary - Republic of Hungary
- Iceland - Kingdom of Iceland
- Iran - Imperial State of Iran
- File:Flag of Iraq 1924.png Iraq - Kingdom of Iraq
- Ireland
- Italy - Kingdom of Italy
- Japan - Empire of Japan
- Latvia - Republic of Latvia (to June 17)
- Liberia - Republic of Liberia
- Liechtenstein - Principality of Liechtenstein
- Lithuania - Republic of Lithuania (to June 15)
- Luxembourg - Grand Duchy of Luxembourg (to May 10)
- Mexico - United Mexican States
- Monaco - Principality of Monaco
- Mongolia - People's Republic of Mongolia
- Nepal - Kingdom of Nepal
- Netherlands - Kingdom of the Netherlands (to May 14)
- New Zealand - Dominion of New Zealand
- Nicaragua - Republic of Nicaragua
- Norway - Kingdom of Norway (to June 7)
- Panama - Republic of Panama
- Paraguay - Republic of Paraguay
- Peru - Republic of Peru
- Poland - Republic of Poland
- Portugal - Portuguese Republic
- Romania - Kingdom of Romania
- San Marino - Most Serene Republic of San Marino
- Saudi Arabia - Kingdom of Saudi Arabia
- Siam - Kingdom of Siam
- South Africa - Union of South Africa
- - Union of Soviet Socialist Republics
- Spain - Spanish Republic
- Sweden - Kingdom of Sweden
- Switzerland - Swiss Confederation
- Turkey - Republic of Turkey
- - United Kingdom of Great Britain and Northern Ireland
- - United States of America
- Uruguay - Eastern Republic of Uruguay
- Vatican City - State of the Vatican City
- Venezuela - United States of Venezuela
- Yemen - Mutawakkilite Kingdom of Yemen
- Yugoslavia - Kingdom of Yugolsavia