World War I participants

Actually the countries of the Entente were ^[1] :

• British empire
• Russian Empire / Republic
• France

On the eve and during the First World War, more than twenty states grouped on the Entente’s side, and the term “Entente” began to be used to refer to the entire anti-German coalition ^[1] :

• Australia
• Belgium
• Bolivia
• Brazil
• Haiti
•   Guatemala
•   Honduras
•   Greece
•   Italy - since May 23, 1915
•   China
•   Costa Rica
•   Cuba
•   Liberia
•   Nicaragua
•   Panama
•   Peru
•   Portugal
•   Romania
•   San marino
•   Serbia
•   USA
•   Siam
•   Uruguay
•   Montenegro
•   Ecuador
•   Japan

•   Austro-Hungarian Empire
•   Bulgarian kingdom
•   German Empire
•   Ottoman Empire

•   Albania - remained neutral, despite the fact that it was occupied by Austria-Hungary , Bulgaria , Greece , Italy and France .
•   Argentina - remained neutral throughout the war, despite a series of incidents with both warring parties ^[2] .
•   Afghanistan
•   Venezuela
•   Denmark - supported de jure neutrality, but de facto supported Germany. At the request of Germany, the Great Belt Bay was mined.
•   Spain
•   Colombia
•   Liechtenstein
•   Luxembourg - did not declare war on the Central Powers, despite the fact that it was occupied by German troops
•   Mexico
•   Mongolia
•   Netherlands
•   Norway
•   Paraguay
•   Persia - officially was a neutral state, despite the fact that military operations were ongoing on its territory.
•   Salvador
•   Tibet
•   Chile
•   Switzerland
•   Sweden
•   Ethiopia

• Recordings on a yellow background indicate a break in diplomatic relations , but not a declaration of war.

• Entente
• Triple Alliance
• Central Powers
• The participants of the Second World War