African American Soldiers 1 Riveters pilots in dress uniforms Mule Rearing gas masks doughboys with mules African American Officers The pilots

Participants in World War I

The war in Europe quickly expanded to other parts of the world. European colonies and dominions in the Americas, Africa, Asia and the Pacific provided men and resources to their mother countries. In some cases, these colonial territories themselves became battlegrounds. The entrance of the Ottoman Empire set off fighting in the Middle East and North Africa. Fighting spread to the seas, as both sides tried to prevent shipments of vital supplies to their opponents. When colonies and other possessions are included, most of today’s modern nations participated in some way.

The following nations formally declared war; not all participated in hostilities.

The Allies and Associated Powers

1914

  • Serbia
  • Russia
  • Montenegro
  • France
  • Belgium
  • Great Britain Includes Canada, Australia, New Zealand, India, South Africa & other British dominions and colonies
  • Japan

1915

  • Italy

1916

  • Portugal
  • Romania

1917

  • United States
  • Cuba
  • Panama
  • Greece
  • Siam
  • Liberia
  • China
  • Brazil

1918

  • Guatemala
  • Nicaragua
  • Costa Rica
  • Haiti
  • Honduras

The Central Powers

1914

  • Austria-Hungary
  • Germany
  • Ottoman Empire(Turkey)

1915

  • Bulgaria

"Pershing" Donors

Founding Sponsor
PritzkerMML Logo


Starr Foundation Logo