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Archduke Franz Ferdinand and his wife are killed
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Period: to
World War I
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Austria-Hungary declares war on Serbia
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First Battle of the Marne starts, and trench warfare begins.
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British Lusitania is sunk by German U-Boats
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Tsar Nicholas II takes control of Russia's armies
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The Battle of Verdun begins. It was the longest and bloodiest battle in WWI
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United States declares war on Germany
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The Bolsheviks overthrow the Russian government
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U.S. President Woodrow Wilson issues his 14 Points to Peace
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Treaty of Versailles ends World War I