World War I was an international brutal conflict between 1914 and 1918.
Germany, Austria-Hungary, Bulgaria and the Ottoman Empire, also called the Central Powers, fought against Great Britain, France, Russia, Italy, Romania, Japan and the United States, which are the Allied Powers.
Thanks to new military technologies and the horrors of trench warfare, World War I saw unprecedented levels of carnage and destruction.
It ended with the defeat of the Central Powers and the death of more than 16 million people throughout Europe and the world.
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