World War 1

By TylerR.
  • Archduke Ferdinand's Assassination

    Archduke Ferdinand's Assassination

  • Austria-Hungary Declares War on Serbia

    Austria-Hungary Declares War on Serbia

    A-H makes demands, Serbia does not comply, A-H declares war because of this.
  • Germany Declares War on Russia

    Germany Declares War on Russia

  • Germany Declares War on France

    Germany Declares War on France

  • Poison Gas

    Poison Gas

    First used by the Germans
  • Submarine Warfare

    Submarine Warfare

    German U-Boat torpedoes A British passenger liner, Lusitania. 1000 people die. Leads to creation of Sussex pledge.
  • Armored Tank

    Armored Tank

    First used by Allies
  • Germany Reverses Policy on Submarine Warfare

    Germany Reverses Policy on Submarine Warfare

    Germany would sink all vessels heading to allied ports.
  • Zimmerman Telegram Published

    Zimmerman Telegram Published

    Telegram from Germany to Mexico intercepted by British, published in newspapers on March 1, 1917.
  • America Joins the Fight

    America Joins the Fight

    President Wilson asks congress for a declaration of war on Germany. Made official on April 6.