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The assassination of Archduke Franz Ferdinand of Austria, heir presumptive to the Austro-Hungarian throne, Duchess of Hohenberg, occurred on 28 June 1914.
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President Woodrow Wilson declared that the United States would remain impartial.
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The sinking of the Cunard ocean liner RMS Lusitania occurred on Friday, 7 May 1915.
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The Espionage Act of 1917 is a United States federal law passed on June 15, 1917.
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The Selective Service Act of 1917 or Selective Draft Act authorized the United States federal government to raise a national army.
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This is when someone declares war when they truly think it is time or they have no choice but to go to war.
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The Zimmermann Telegram was a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico.
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In Europe in June 1917. However the AEF did not participate at the front until October 21, 1917.
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President Woodrow Wilson established the committee in April 1917 in response to the U.S. entry into World War I in an attempt to make public opinion behind the war effort with every available form of mass communication.
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Jul 15, 1918 – Aug 6, 1918 The Second Battle of the Marne was the last major German offensive on the Western Front.
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The Fourteen Points was a statement of principles for peace negotiations in order to end World War I. The principles were outlined in a January 8, 1918.
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19, 1919, the Senate rejected the Treaty of Versailles based primarily on objections to the League of Nations. The U.S. would never ratify the treaty or join the League of Nations.
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Jan 18, 1919 – Jan 21, 1920 The Paris Peace Conference was the formal meeting in 1919 and 1920 of the victorious Allies after the end of World War I to set the peace terms for the defeated Central Powers.
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The Armistice of 22 June 1940, often referred as the Surrender of France, was signed at 18:36 near Compiegne, France, by officials of Nazi Germany and the Third French Republic. It did not happen until after midnight on 25 June.