Allies of World War I
group of countries that fought against the Central Powers in World War I Allies of World War I Military alliance 1914–1918 Allied and Associated Powers (and their colonies) Central Powers (and their colonies) Neutral Powers Principal allied and associated powers: France British Empire Italy (from 1915, previously part of the Triple Alliance) United States (from 1917 as co-belligerent) Japan Until 1917: Russia (member of the Triple Entente) Other allies: Serbia Belgium Luxembourg Montenegro Emirate of Asir (from 1915) Emirate of Nejd and Hasa (from 1915) Portugal (from 1916) Romania (from 1916) Hejaz (from 1916) Greece (from 1917) China (from 1917) Siam (from 1917) Other co-belligerents: Albania [1] Brazil (from 1917) Armenia (1918) Capital Not specified Political structure Military alliance Historical era World War I • Established 1914 • Disestablished 1918 Succeeded by Allies of World War II European diplomatic