• Assassination of Archduke Franz Ferdinand I

    Archduke Franz Ferdinand, heir to Austria-Hungary's throne, and his wife, Sophie, are assassinated by Serbian nationalist Gavrilo Princip while the couple were visiting Sarajevo.
  • Austria-Hungary declares War on Serbia

    Austria-Hungary declares war on Serbia for killing the archduke.
  • Germany declares war on Russia

    Germany declares war on Russia.
  • Germany declares war on France

    Germany declares war on France.
  • United Kingdom declares war on Germany

    The United Kingdom declares war on Germany, after Germany invades Belgium. UK is promised to protect Belgium's neutrality,
  • - Austria-Hungary declares war on Russia and Serbia declares war on Germany.

    • Austria-Hungary declares war on Russia and Serbia declares war on Germany.
  • U.S. will remain neutral

    U.S. President Woodrow Wilson announces the U.S. will remain neutral. Won't fight until they have a reason.
  • The First Battle of the Marne begins

    Trench warfare begins as soldiers on both sides dig in.
  • Germany declares a "war zone" around Great Britain

    Essentially effecting a submarine blockade where even neutral merchant vessels were to be potential targets.
  • The Battle of Gallipoli begins.

    Took place in the Ottoman Empire
  • RMS Lusitania is sunk

    The British ocean liner RMS Lusitania is sunk by German U-boat, U-20.
  • The Battle of Verdun begins

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

    The major naval battle of the war, begins.
  • Battle of the Somme

    During the Battle of the Somme, tanks are first introduced into battle.
  • Zimmerman Telegram

    Germany sends the secret Zimmerman Telegram to Mexico in an effort to entice Mexico to join the war. The British intercept and decipher the coded message. Big reason for the US going to war.
  • The United States declares war on Germany

    The United States declares war on Germany for multiple reasons.
  • Bolsheviks successfully overthrow the Russian government

    Bolsheviks successfully overthrow the Russian government during the 1917 Russian Revolution.
  • Fourteen Points

    U.S. President Woodrow Wilson issues his Fourteen Points to peace.
  • Russia signs the Treaty of Brest Litovsk

    It is a peace treaty between Russia and the Central Powers.
  • Germany launches the Spring Offensive.

    Germany launches the Spring Offensive. Spring Offensive or Kaiserschlacht. German attacks along the Western Front .
  • The Treaty of Versailles

    The Treaty of Versailles ends WWI. , Germany and the Allied Nations (including Britain, France, Italy and Russia) signed the Treaty of Versailles