World War I

  • Period: to

    The Declarations of War

    The treaties and alliance system led the Central and Entente powers to each declare war on each other.
  • Germany Declares War on Russia

  • The Russian Great Retreat from Poland and Galicia.

  • Battle of the Somme

    Battle of the Somme
    The battle was one of the largest of World War I, in which more than 1,000,000 men were wounded or killed, making it one of the bloodiest battles in human history.
  • Zimmerman Telegram

    Zimmerman Telegram
    The German Foreign Secretary Arthur Zimmermann sends a telegram to his ambassador in Mexico, instructing him to propose to the Mexican government an alliance against the United States.
  • Russia: Czar Nicholas II abdicates. A provisional government is appointed.

  • The United States of America declares war on Germany

  • First American troops land in France.

    First American troops land in France.
  • Battle of the Argonne Forest

    The Meuse-Argonne Offensive, also known as the Maas-Argonne Offensive and the Battle of the Argonne Forest, was a part of the final Allied offensive of World War I that stretched along the entire Western Front.
  • The War is Over

    The War is Over