History of Oceania

What countries were involved of world war 1?

The main countries involved in World War I were:

- Allied Powers:

- France

- United Kingdom

- Russian Empire (until 1917)

- Italy (from 1915)

- United States (from 1917)

- Japan

- Serbia

- Belgium

- Montenegro

- Romania

- Greece

- Portugal

- Brazil (from 1917)

- China (from 1917)

- Siam (now Thailand) (from 1917)

- Central Powers:

- Germany

- Austria-Hungary

- Ottoman Empire

- Bulgaria