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Archduke Franz Ferdinand assassinated
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. -
Period: to
World War 1
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Austria-Hungary declares war on Serbia.
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Germany declares war on Russia.
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Germany declares war on France.
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The United Kingdom declares war on Germany.
after Germany invades Belgium -
U.S. President Woodrow Wilson announces the U.S. will remain neutral.
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Lusitania is sunk
May 7 - The British ocean liner RMS Lusitania is sunk by German U-boat, U-20 -
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. -
The United States declares war on Germany.
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The Bolsheviks Revolution
The Bolsheviks successfully overthrow the Russian government. -
14 Points
U.S. President Woodrow Wilson issues his Fourteen Points to peace. -
The Treaty of Versailles
officially ends WWI.
