İtilaf Devletleri
- flagicon|Albania|1914 Arnavutluk
- flagicon|Andorra Andorra
- flagicon|Armenia|1918 Demokratik Ermenistan Cumhuriyeti
- flagicon|Belgium|state Belçika
- flagicon|Bolivia|state Bolivya
- flagicon|Brazil|1889a Brezilya
- flagicon|UK Britanya İmparatorluğuref|BritishEmpire
- flagicon|Australia Avustralya
- flagicon|Canada|1868 Kanada
- flagicon|India|British Hindistan İmparatorluğu (Şimdiki Bangladeş, Hindistan ve Pakistan)
- flagicon|Newfoundland Newfoundland
- flagicon|New Zealand Yeni Zelanda
- flagicon|South Africa|1910 Güney Afrika Birliği
- flagicon|UK Büyük Britanya ve İrlanda Birleşik Krallığı
- flagicon|UK Britanya Denizaşırı Toprakları
- Çin Cumhuriyeti
- flagicon|Costa Rica|state Kosta Rika
- flagicon|Bohemia Çekoslovak Birliği
- flagicon|Cuba Küba
- flagicon|Ecuador Ekvador
- flagicon|France Fransa
- flagicon|Greece|old Yunanistan Krallığı
- flagicon|Guatemala Guatemala
- flagicon|Haiti Haiti
- flagicon|Honduras Honduras
- flagicon|Italy|1861 İtalya Krallığı
- flagicon|Japan|alt Japon İmparatorluğu
- flagicon|Liberia Liberya
- flagicon|Montenegro|1910 Karadağ Krallığı
- flagicon|Nicaragua Nikaragua
- flagicon|Panama Panama
- flagicon|Peru|1825 Peru
- flagicon|Portugal Portekiz
- flagicon|Romania|1867 Romanya Krallığı
- flagicon|Russia Çarlık Rusyası
- flagicon|San Marino San Marino
- flagicon|Serbia|1882 Sırbistan Krallığı
- flagicon|Thailand Siyam (şimdiki Tayland)
- flagicon|Uruguay Uruguay
- flagicon|USA|1912 Amerika Birleşik Devletleri
İttifak Devletleri
- Avusturya-Macaristan İmparatorluğu
- flagicon|Bulgaria|1878 Bulgaristan
- flagicon|Germany|empire Alman İmparatorluğu
- Osmanlı İmparatorluğu
Tarafsızlar
- flagicon|Afghanistan|1901 Afganistan
- flagicon|Argentina Arjantin
- flagicon|Colombia Kolombiya
- flagicon|Denmark Danimarka
- flagicon|El Salvador El Salvador
- flagicon|Ethiopia|1897 Etiyopya İmparatorluğu
- flagicon|Luxembourg Lüksemburg
- flagicon|Mexico|1899 Meksika
- flagicon|Netherlands Hollanda
- flagicon|Norway Norveç
- flagicon|Paraguay Paraguay
- Fars
- flagicon|Spain|1785 İspanya
- flagicon|Sweden İsveç
- flagicon|Switzerland İsviçre
- flagicon|Venezuela Venezuela
Notlar
- note|BritishEmpire The British Empire was the common term for the United Kingdom and its overseas possessions at this time. The term refers to the colonies it controlled, to the Indian Empire, which, while not officially designated a colony, was functionally indistinguishable from one, and the British Dominions - former colonies which were self-governing in most respects but whose foreign policy was controlled by London; Canada, Australia, Newfoundland, New Zealand and South Africa.
- note|decwars Entries on a yellowish background refer to severed diplomatic relations only, not to actual declarations of war
