World War I World War I was a military conflict that began as a local European war between Austria-Hungary and Serbia on July 28, 1914 and eventually became a global war involving 32 nations. Twenty-eight of these nations, known as the Allies and the Associated Powers, and including Britain, France, Russia, Italy, and the United States, opposed the coalition known as the Central Powers, consisting of Germany, Austria-Hungary, the Ottoman Empire (now Turkey), and Bulgaria. The immediate cause …showed first 75 words of 9290 total…

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