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Archduke Franz Ferdinand is assassinated.
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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.
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Austria-Hungary declares war on Russia, and Serbia declares war on Germany.
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U.S. President Woodrow Wilson declares the U.S. will remain neutral.
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The British RMS Lusitania is sunk by Germany.
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The Battle Of Somme begins.
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Germany attempts to persuade Mexico to join the war. The British decode the message.
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U.S. joins the war.
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U.S. President Woodrow Wilson issues the Fourteen Points.
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Germany signs the armistice, which stops the fighting.
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The Treaty of Versailles officially ends the war.
