Participating Nations

In the First World War, four Central Powers nations fought twenty-four Allied nations. The map below shows a colony or dependency in the same color as the country governing it. The name of each participating nation, along with the date on which each entered the war, is given in the table below the map.

map of participants in World War I

Central Powers
Austria-Hungary Bulgaria Germany Ottoman Empire	July 28, 1914 October 14, 1915 August 1, 1914 October 29, 1914

Allies
Belgium Brazil British Empire China Costa Rica Cuba France Greece Guatemala Haiti Honduras Italy Japan Liberia Montenegro Nicaragua Panama Portugal Romania Russia San Marino Serbia Siam United States	August 4, 1914 October 26, 1917 August 4, 1914 August 14, 1917 May 23, 1918 April 7, 1917 August 3, 1914 June 27, 1917 April 23, 1918 July 12, 1918 July 19, 1918 May 23, 1915 August 23, 1914 August 4, 1917 August 5, 1914 May 8, 1918 April 7, 1917 March 9, 1916 August 27, 1916 August 1, 1914 June 3, 1915 July 28, 1914 July 22, 1917 April 6, 1917

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This page was last updated on 10/20/2011.