Other nations joined the Entente as вЂњassociated powersвЂќ rather than official allies, including the United States, Serbia, Belgium, Romania, Greece, and Montenegro. As the war progressed, other countries joined the Entente such as Japan in 1914 and Italy in 1915 after proclaiming neutrality at the beginning of the war. In November 1914, the Triple Entente entered World War I as the Allied Powers against the Central Powers of Germany, the Ottoman Empire, Bulgaria, and Austria-Hungary. When France mobilized in response to GermanyвЂ™s declaration of war on Russia, Germany declared war France on August 4, 1914, followed by France declaring war on Austria-Hungary on August 12, 1914. In 1904, France entered the Entente Cordiale with Great Britain, whose army and Royal Navy, were committed to supporting France in the event of war with Germany. After Germany broke off its alliance with Russia, France took advantage by agreeing to the Franco-Russian Alliance. The French Republic was defeated in the Franco-Prussian War, losing the two provinces of Alsace-Lorraine and resulting in the formation of a new regime that caused a deep political divide. Germany declared war on Russia in response on August 1, 1914, followed by Austria-Hungary on August 6. Russia viewed itself as a defender of Serbia and mobilized in support of it. While Russia and France agreed to the Franco-Russian Alliance in 1894, Britain grew increasingly suspicious of the Russian Empire, especially as Russia grew closer to British IndiaвЂ™s border. Russia was allied with Germany and Austria-Hungary in the League of the Three Empires from 1873-1887 until Germany allowed the Reinsurance Treaty to relapse. On August 4, 1914, Britain declared war on Germany after Germany invaded Belgium. European nations formed two main alliances, the Triple Entente and the Triple Alliance, and members of each alliance agreed to fight on the side of any. Britain would be committed to helping France with its British Expeditionary Force and Royal Navy if it entered a war with Germany, as well as intervene if German entered Belgium, to whom Britain guaranteed neutrality against aggression by any other country. This changed after Europe began dividing into opposing powers and Great Britain entered into the Entente Cordiale with France in 1904. Great Britain practiced a policy called splendid isolation for most of the 19th century where it sought to keep the European balance of power without formal alliances. Unlike the Triple Alliance, the Triple Entente was not an alliance of mutual defense. The Triple Entente was officially composed of Great Britain, Russia, and France, opposing the Triple Alliance of Germany, Austria-Hungary, and Italy.

What nations formed the triple entente