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Britian
As a result, Britain began to support Russia and France. Britain joined the Triple Entente. Despite being part of the Triple Entente, Britain was not committed to going to war in 1914. -
Russia
Prisoners of War in Russia. During World War I, approximately 200,000 German soldiers and 2.5 million soldiers from the Austro-Hungarian army entered Russian captivity. During the 1914 Russian campaign the Russians began taking thousands of Austrian prisoners. -
France
France was bound by treaty to defend Russia. Austria–Hungary had declared war on Serbia due to the Black Hand's assassination of Archduke Ferdinand, which acted as the immediate cause of the war. France was brought into the war by a German declaration of war on August 3, 1914. -
United States
United States in WWI. Although World War I began in 1914, the United States did not join the war until 1917. ... The additional firepower, resources, and soldiers of the U.S. helped to tip the balance of the war in favor of the Allies.