Japan
Entente Powers
Denmark
neutral powers
Great Britain
Entente Powers
Bulgaria
Central Powers
Ottoman Empire
Central Powers
Belgium
neutral powers
Spain
neutral powers
Austria-Hungary
Central Powers
France
Entente Powers
German Empire
Central Powers
Russia
Entente Powers
Serbia
Entente Powers
Italy
Entente Powers
United States
Entente Powers
Sweden
neutral powers
India
Entente Powers
Switzerland
neutral powers
Canada
Entente Powers