Participants in World War I

From Wikipedia, the free encyclopedia

European military alliances in 1915. The Central Powers are depicted in puce, the Allies in grey and neutral countries in yellow.
European military alliances in 1915. The Central Powers are depicted in puce, the Allies in grey and neutral countries in yellow.
Map of the World with the Participants in World War I. The Allies are depicted in green, the Central Powers in yellow, and neutral countries in grey.
Map of the World with the Participants in World War I. The Allies are depicted in green, the Central Powers in yellow, and neutral countries in grey.

This is a list of countries that participated in World War I, sorted by alphabetical order.

Contents

Note: The Entente Forces are sometimes also referred to as the Entente Powers or Allies of World War I.

Allies and Central Powers, early August 1914
Allies and Central Powers, early August 1914
Allies and Central Powers, mid 1918
Allies and Central Powers, mid 1918

The following table shows the timeline of the several declarations of war [2] among the belligerent powers.

Date Declarer On
1914
July 28 Austria-Hungary Serbia
August 1 Germany Russia
August 3 Germany France
August 4 United Kingdom Germany
Germany Belgium
August 5 Montenegro Austria-Hungary
August 6 Austria-Hungary Russia
Serbia Germany
August 9 Montenegro Germany
August 11 France Austria-Hungary
August 12 United Kingdom Austria-Hungary
August 22 Austria-Hungary Belgium
August 23 Japan Germany
August 25 Japan Austria-Hungary
November 1 Russia Ottoman Empire
November 2 Serbia Ottoman Empire
November 3 Montenegro Ottoman Empire
November 5 United Kingdom
France		 Ottoman Empire
1915
May 23 Italy Austria-Hungary
June 3 San Marino Austria-Hungary
August 21 Italy Ottoman Empire
October 14 Bulgaria Serbia
October 15 United Kingdom
Montenegro		 Bulgaria
October 16 France Bulgaria
October 19 Italy
Russia		 Bulgaria
1916
March 9 Germany Portugal
March 15 Austria-Hungary Portugal
August 27 Romania Austria-Hungary
Italy Germany
August 28 Germany Romania
August 30 Ottoman Empire Romania
November 1 Bulgaria Romania
1917
April 6 United States Germany
April 7 Cuba Germany
April 10 Bulgaria United States
April 13 Bolivia Germany
April 20 Ottoman Empire United States
July 2 Greece Germany
Austria-Hungary
Ottoman Empire
Bulgaria
July 22 Thailand Germany
Austria-Hungary
August 4 Liberia Germany
August 14 China Germany
Austria-Hungary
October 6 Peru Germany
October 7 Uruguay Germany
October 26 Brazil Germany
December 7 United States Austria-Hungary
December 7 Ecuador Germany
December 10 Panama Austria-Hungary
December 16 Cuba Austria-Hungary
1918
April 23 Guatemala Germany
May 8 Nicaragua Germany
Austria-Hungary
May 23 Costa Rica Germany
July 12 Haiti Germany
July 19 Honduras Germany
November 10 Romania Germany

  1. ↑  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.
  2. ↑  Entries on a yellowish background refer to severed diplomatic relations only, not to actual declarations of war

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 World War I Portal
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