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Hungarian throne and his wife were assonated which limitedly caused the war because the group the person shot them was in was bad -
they started this because German soldiers wouldn't move off of Belgum which started a war against them imminently -
On May 7, 1915, the German submarine (U-boat) U-20 torpedoed and sank the Lusitania, a swift-moving British cruise liner traveling from New York to Liverpool, England. Of the 1,959 men, women, and children on board, 1,195 perished, including 123 Americans. -
British troopship Ivernia was torpedoed and sunk in the Mediterranean Sea by German submarine SM UB-47, with the loss of 125 lives -
And on April 6, 1917, the United States declared war on the German Empire, joining France, Great Britain, Russia, Canada, Australia, New Zealand, South Africa and Italy. They were arrayed against Germany, Austria-Hungary, the Ottoman Empire and Bulgaria.
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On November 6 and 7, 1917 (or October 24 and 25 on the Julian calendar, which is why the event is often referred to as the October Revolution), leftist revolutionaries led by Bolshevik Party leader Vladimir Lenin launched a nearly bloodless coup d’état against the Duma’s provisional government. -
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. -
This Day in History, November 11, 1918: World War I Ends. 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. Of note, on the same day, five-years earlier the Archduke Franz Ferdinand of Austria was assassinated at Sarajevo, Bosnia, starting the war. Ten days after the Armistice, the German High Seas Fleet steamed into the Firth of Forth between parallel lines of the Allied Grand Fleet Ships.