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Archduke Ferdinand was heir to the throne of Austria-Hungary. The Serbian group called the Black Hand was the group that Gavrilo Princip was in. Gavrilo Princip is the assassin that killed Ferdinand.
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On July 28, 1914, Russia mobilized their troops when Austria declared war on Serbia.
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On August 1, 1914 Germany mobilized their troops and joined the war against Russia. Two days later Germany delcared war on France.
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The U-Boat sunk the British liner Lusitania. The U.S got mad about it because 128 U.S citizens were on board.
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Submarines could be sunk without warning unless it was a passenger boat.
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The Zimmerman Note is sent to President Wilson on Febuary 26, 1917. This led Wilson to start preparing troops to join World War I.
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The U.S joins the war on April 2, 1917. President Wilson makes the world more safer for a democracy
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President Wilson put through his 14 Point that initiated world peace.
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World War One ended on November 11, 1918 and did not technically be over until June of 1919 but no more fighting went on.
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The Treaty of Versailles was enforced in June 28, 1919. It ended all of the war thoughts and everyone was at peace with each other and alliances started.
