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World War I

  • Archduke, Franz Ferdinand, Killed

    Archduke, Franz Ferdinand, Killed
    Archduke Franz Ferdinand was assassinated. He was killed by a Serbian nationalist named Gavrilo Princep.
  • Austria-Hungary Declares War on Serbia

    Austria-Hungary Declares War on Serbia
    Because Gavrilo Princep, a Serbian nationalist, shot the Archduke of Austria-Hungary, Austria-Hungary declared war on Serbia.
  • First use of Gas as a Weapon by the Germans

    First use of Gas as a Weapon by the Germans
    During World War I, different countries were making new weapons. The Germans were the first to use chemical warfare. They used poisonous gas. It was so effective that the Allies started to use it.
  • Sinking of the Lusitania

    Sinking of the Lusitania
    The Germans fired a torpedo from a U-boat. The torpedo hit a British passenger ship called the Lusitania. More than 1,000 people died and among them were 128 Americans.
  • Wilson Re Elected; Pledged American neutrality

    Wilson Re Elected; Pledged American neutrality
    Wilson defeated Charles Evan Hughes. He pledged to remain neutral in the war in Europe. The neutrality did not last long, and the US entered the war.
  • Zimmermann Note

    Zimmermann Note
    Arthur Zimmerman was a German who thought it was a good idea to send a telegram to Mexico. The telegram said for Mexico to fight with the US. The US eventually got the telegram. That was the last straw for the US.
  • US Declares War

    US Declares War
    The Zimmermann Note was the last straw for Wilson and Wilson declared war on Germany. Socialists and pacifists opposed the war.
  • Bolsheviks Led by Lenin Overthrow Russian Government

    Bolsheviks Led by Lenin Overthrow Russian Government
    A revolution took place in Russia towards the end of World War I. The group that formed this revolution was called the Bolsheviks. The Bolsheviks were led from Vladimir Lenin. Together they overthrew the Russian government.
  • War Ends

    War Ends
    The armistice began on this day. Under the terms of the armistice, Germany had to withdraw all land forces west of the Rhine River, to withdraw its fleet to the Baltic Sea, and to surrender huge amounts of equipment.
  • Treaty of Versailles

    Treaty of Versailles
    Under its terms, Germany had to accept full responsibility for the conflict. Germans had to pay the Allies billions of dollars. Germans had to disarm completely and give up overseas colonies and some territory in Europe.