World War I - The Great War

  • Period: to

    The Time of War

  • Archduke Franz Ferdinand Assassinated

    Archduke Franz Ferdinand Assassinated
    A nationalist group in Serbia was formed called The Black Hand. The Archduke was scheduled for an inspection of Austria-Hungarian troops. Gavrilo Princip, a Serbian nationalist and a memeber of The Black Hand, assassinated the Archduke and his wife on the day of the inspection.
  • Unofficial Truce

    Unofficial Truce
    The unofficial Christmas Day truce was declared by soldiers along the Western Front. It was a series of widespread unofficial ceasefires that took place along the Western Front around Christmas time. Tension was temporarily lessened.
  • First Use of Poison Gas

    First Use of Poison Gas
    Germany was the first to use poison gas on a large scale which started the second Battle of Ypres.
  • Treaty of London

    Treaty of London
    France, Russia, Italy and Britain conclude secret treaty. Italy was to leave the Triple Alliance and join Triple Entente and declare war against Germany and Austria-Hungary within a month.
  • Battle of Jutland

    Battle of Jutland
    The Battle of Jutland was the only truly large-scale naval battle of the war. The battle was between Britain and Germany. Germany ultimately withdrew from the battle.
  • Tanks Introduced for the First Time

    Tanks Introduced for the First Time
    Tanks were introduced for the first time on the Somme battlefield by the British. They were used to break the deadlock of trench warfare.
  • United States Declares War on Germany

    United States Declares War on Germany
    The United States declared war on Germany in response to the sinking of US ships by German U boats.
  • United States Declares War on Austria-Hungary

    United States Declares War on Austria-Hungary
    The Zimmerman Telegram, that suggested that Germany was willing to help Mexico regain territory in Texas and Arizona, intensified opinion against the Central Powers. This ultimately led to declaration of war.
  • 'Black Day' for German Army

    'Black Day' for German Army
    Haig directs start of successful Amiens offensive, forcing all German troops back to the Hindenburg Line. Ludendorff calls it a 'black day' for the German army.
  • Armistice Day

    Armistice Day
    At 11 am, the Armistice was signed in France bringing the war to an end. The Armistice was signed by the Allies and Germany.