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Archduke Franz Ferdinand of Austria, heir to the Austro-Hungarian throne and his wife Sophie, Duchess of Hohenberg were assassinated in Sarajevo -
Great Britain declares war on Germany, after much tension and events -
The German submarine (U-boat) U-20 torpedoed and sank the Lusitania -
Presidential elections were held in the United States on November 7, 1916. Incumbent Democratic President Woodrow Wilson narrowly defeated former associate justice of the Supreme Court Charles Evans Hughes, the Republican candidate. -
A blast at a munitions factory in London killed 73 and injured over 400 workers -
The United States declared war on the German Empire, joining France, Great Britain, Russia, Canada, Australia, New Zealand, South Africa and Italy -
British advance on Souchez river continues. French carry crest near Hurtebise ("Dragon's Cave"). First fighting contingent of American troops lands in France. -
The Sedition Act of 1918 was enacted on May 16, 1918 to extend the Espionage Act of 1917. The Sedition Act covered a broader range of offenses, notably speech and the expression of opinion that cast the government or the war effort in a negative light or interfered with the sale of government bonds. -
On November 11, 1918 an armistice was signed between the Germans and the Allies, ending World War I. -
The Versailles Peace Treaty, signed on June 28, 1919, officially ended World War I