World War I

  • War on Serbia

    Austria-Hungary declares war on Serbia
  • War on Russia

    Germany declares war on Russia
  • War on France

    Germany declares war on France
  • War on Germany

    The United Kingdom declares war on Germany, after Germany invades Belgium
  • War on Germany/Russia

    Austria-Hungary declares war on Russia and Serbia declares war on Germany
  • Battle of Tannenberg

    Battle of Tannenberg
    The beginning of the Battle of Tannenberg begins
  • Blockage of goods

    The United Kingdom announces that the North Sea is a military area, effectively creating a blockade of goods into Germany
  • "War Zone"

    Germany declares a "war zone" around Great Britain, essentially effecting a submarine blockade where even neutral merchant vessels were to be potential targets
  • First use of poison gas

    First use of poison gas
    The Second Battle of Ypres begins. It is during this battle that the Germans first use poison gas
  • Battle of Verdun

    The Battle of Verdun begins. The Battle of Verdun was the longest battle of World War I and was one of the bloodiest.
  • Battle of the Somme

    The Battle of the Somme begins. During the Battle of the Somme, tanks are first introduced into battle.
  • War on Germany

    War on Germany
    The United States declares war on Germany
  • Treaty of Brest Litovsk

    Russia signs the Treaty of Brest Litovsk, which is a peace treaty between Russia and the Central Powers.
  • The Treaty of Versailles

    The Treaty of Versailles
    WWI officially ends with the Treaty of Versailles being signed