World War I Timeline

  • Crisis in the Balkans

    Crisis in the Balkans
    Gavrilo Princip assassinates Austrian Archduke Franz Ferdinand
  • War Declared

    War Declared
    Unhappy at Serbia's response, Austria-Hungary declares war on Serbia
  • Allies Join

    Allies Join
    Due to her alliances, Russia mobilizes armed forces to support Serbia
  • Germany joins

    Germany joins
    Due to alliances, Germany declares war on Russia
  • More from Germany

    More from Germany
    Germany declares war on France
  • Schlieffen Plan

    Schlieffen Plan
    Germany invades Belgium. Britain declares war on Germany
  • Austria-Hungary strikes

    Austria-Hungary strikes
    Austria-Hungary declares war Russia
  • Allies declare war

    Allies declare war
    France and Great Britain declare war on Austria-Hungary