World War-I was fought between:

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World War-I was fought between: Answer: 1914-1918

World War I (1914-1918) was fought between two main alliances: the Allied Powers (France, Britain, Russia, Italy, Japan, and the U.S.) and the Central Powers (Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria), involving over 30 nations in a global conflict with unprecedented scale and destruction, shifting alliances as the war progressed.