Allies:
- France
- Russia
- Great Britain
- Italy
- Serbia
- Belgium
- United States
- Romania
- Japan
- Greece
The Allies were fighting for the preservation of their empires, the balance of power in Europe, and the containment of Germany.
Central Powers:
- Germany
- Austria-Hungary
- Ottoman Empire
- Bulgaria
The Central Powers were fighting for the expansion of their territories, the establishment of a German-dominated Europe, and the destruction of the Russian Empire.