World War I

  • Period: to


  • Archduke Franz Ferdinand was Assassinated

  • Austria's Ultimatum to Serbia

  • Austria Declares War on Serbia

  • Britain Declares War on Germany

  • Battle of Tannenberg Begins

  • First battle of the Marne Begins

  • Trench Warfare Begins

  • Japan Presents the 21 Demand to China

  • Battle of Gallipoli

  • Sinking of the Lusitania

  • German U-Boat Warfare Begins

  • Italy Joins the Allies

  • Battle of Jutland Begins

  • Battle of Verdun Begins

  • Battle of the Somme

  • Zimmerman Note Discovered

  • Unrestricted U-Boat Resumed

  • America Enters the War

  • Russian Communist Revolution Begins

  • Treaty of Brest-Litovsk Signed

  • Hindenburg Offensive Begins

  • Meuse-Argonne Offensive Begins

  • The Armistice is Signed

  • Kaiser Wilhelm Abdicates

  • Treaty of Versailles Ends the War