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  1. World War I - Wikipedia

    Major areas of conflict included Europe and the Middle East, as well as parts of Africa and the Asia-Pacific. The war saw important developments in weaponry including tanks, aircraft, …

  2. World War I - Encyclopedia Britannica

    Dec 27, 2025 · World War I, an international conflict that in 1914–18 embroiled most of the nations of Europe along with Russia, the United States, the Middle East, and other regions.

  3. World War I: Causes and Timeline | HISTORY

    World War I—also known as the Great War—pitted Germany, Austria-Hungary and the Ottoman Empire against Great Britain, the United States, France, Russia, Italy and Japan. New military...

  4. World War I Timeline Experience “The Great War: A Visual History”

    Here's how you know. ABMC honors the services of overseas U.S. armed forces by maintaining and promoting America’s overseas commemorative cemeteries and memorials.

  5. About WWI - National WWI Museum and Memorial

    World War I changed everything, including how humanity expressed itself through the culture and arts of the time. Learn why veterans of WWI, in a racially integrated movement, marched on …

  6. WORLD WAR I OVERVIEW - HISTORY CRUNCH

    World War I occurred from 1914 until 1918 and was one of the most significant events of the 20th century. At the time, it was referred to as the ‘Great War’ or the ‘War to End All Wars’. Today, …

  7. The Causes of WWI - World History Encyclopedia

    May 15, 2025 · The origins of the First World War (1914 to 18) are many and varied, with some even dating back several decades, but a political assassination in the Balkans in the summer …

  8. World War One (WW1) | HistoryExtra

    World War One (WW1) was a major global conflict that lasted four years, from 1914 to 1918. It began on 28 July 1914, when Austria-Hungary declared war on Serbia one month to the day …

  9. World War I: The Great War | World War I (1917 to 1918) | Serving: …

    So massive was the destruction wrought by this conflict that many thought it would be the war to end all wars--hence the eventual designation of it as “The Great War.” The United States had …

  10. First World War - National Army Museum

    From 1914 to 1918, fighting took place across several continents, at sea and, for the first time, in the air. This was war on an unprecedented scale, with battles often lasting months instead of …