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  1. World War I: Summary, Causes & Facts | HISTORY

    Oct 29, 2009 · World War I, also known as the Great War, started in 1914 after the assassination of Archduke Franz Ferdinand of Austria. His murder escalated into a war across Europe that lasted until …

  2. World War I: Causes and Timeline | HISTORY

    World War I was fought from 1914 to 1918. Learn more about World War I combatants, battles and generals, and what caused World War I.

  3. World War I Timeline: Battles & Major Events | HISTORY

    Apr 8, 2021 · This World War I timeline of battles outlines the most important engagements of the 1914-1918 war, from the first Bat...

  4. 8 Events that Led to World War I - HISTORY

    Apr 6, 2021 · Imperialism, nationalistic pride and mutual alliances all played a part in building tensions that would erupt into war.

  5. Outbreak of World War I - HISTORY

    Aug 24, 2018 · World War I began in 1914 after the assassination of Archduke Franz Ferdinand of Austria-Hungary set off a chain reaction of alliances.Rising nationalism, militarism and imperial …

  6. Armistice Day: World War I ends | November 11, 1918 | HISTORY

    Mar 10, 2010 · At the 11th hour on the 11th day of the 11th month of 1918, World War I ends. At 5 a.m. that morning, Germany signed ...

  7. How Airplanes Were Used in World War I - HISTORY

    Feb 10, 2022 · Even though airplanes were a relatively new invention, the race for air superiority started during World War I.

  8. Why Did the US Enter World War I? | HISTORY

    Apr 6, 2017 · The United States entered World War I in 1917, following the sinking of the British ocean liner Lusitania and the sho...

  9. How the World War I Era Broke the British Aristocracy

    Sep 11, 2025 · World War I not only toppled empires and redrew borders—it remade the modern world, with few nations feeling the effects as profoundly as Great Britain. The country’s deadliest war —from ...

  10. Life in the Trenches of World War I - HISTORY

    Apr 23, 2018 · Trenches—long, deep ditches dug as protective defenses—are most often associated with World War I, and the results of trench warfare in that conflict were hellish indeed.