World War One (the First World War) was fought from 28 July 1914 to 11 November 1918.

Quick Scoop

  • Start date: 28 July 1914, when Austria‑Hungary declared war on Serbia after the assassination of Archduke Franz Ferdinand.
  • End date: 11 November 1918, with an armistice between Germany and the Allies that stopped the fighting on the Western Front.
  • Overall span often given as: 1914–1918.

One‑line version

World War One lasted a little over four years, from late July 1914 until the armistice on 11 November 1918.

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