World War I was a military conflict from 1914 to 1918. It began as a local European war between Austria - Hungary and Serbia on July 28, 1914. It was transformed into a general European struggle by declaration of war against Russia on August 1, 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 Great Britain, France, Russia, Italy, and the United States, opposed the coalition known as the Central Powers, consisting of Germany, Austria - Hungary, Turkey, and Bulgaria. The immediate cause…
