FANDOM


The following is a list of the major belligerents of World War I:

Allied PowerEdit

Triple Entente

Central PowerEdit

Triple Entente
Co-belligerents
co-belligerents
  • Bulgaria (1915–18)
  • Kingdom of Belgium
  • Kingdom of Montenegro
  • Japanese Empire
  • Italy (Apr 1915)
  • San Marino (Jun 1915)
  • Hejaz (1916–18)
  • Portuguese Republic (Mar 1916)
  • Kingdom of Romania (Aug 1916-May 1918)
  • Panama (Dec 1917)
  • Peru (Oct 1917)
  • Uruguay (Oct 1917)
  • United States (1917–18)
  • Kingdom of Greece (Jun 1917)
  • Kingdom of Siam (Thailand-Siam) (1917–18)
  • Albania
  • Czechoslovakia
  • Nepal
  • Cuba (Apr 1917)
  • Boliva (Apr 1917)
  • China (Aug 1917)
  • Liberia (Aug 1917)
  • Brazil (Oct 1917)
  • Finland (Oct 1917)
  • Ecuador (Dec 1917)
  • Andorra
  • Guatemala (Apr 1918)
  • Nicaragua (May 1918)
  • Armenia (May 1918)
  • Costa Rica (May 1918)
  • Haiti (July 1918)
  • Honduras (Jul 1918)
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