Who replaced Russia on the Allied side in 1917-18? *

The Allies of World War I or Entente Powers were the coalition that opposed the Central Powers of Germany, Austria–Hungary, the Ottoman Empire, and Bulgaria during the First World War (1914–1918).

By the end of the first decade of the 20th century, the major European powers were divided between the Triple Entente and the Triple Alliance. The Entente was made up of France, the United Kingdom and Russia. The Triple Alliance was originally composed of Germany, Austria–Hungary and Italy, which remained neutral in 1914.

As the war progressed, each coalition added new members. Japan joined the Entente in 1914. After proclaiming its neutrality at the beginning of the war, Italy also joined the Entente in 1915. The United States joined as an "associated power" rather than an official ally. "Associated members" included Serbia, Belgium, Greece, Montenegro, and Romania.[1] The Allies sponsored several revolts in the Ottoman Empire, including the Nejd and Hasa 1915, the Arab Revolt in June 1916, and several Kurdish uprisings in August 1917.

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