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Archduke Franz Ferdinand and his wife were assassinated while visiting Sarajevo, Bosnia. He was next in line for the Austro-Hungarian throne. The killings set off decades old tensionsin Europe and started WWI.
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Because of the assassination of Ferdinand, the World War I started and it changed many people's reactions.
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The introduction of poison gas, however, would have great significance in World War I. Immediately after the German gas attack at Ypres, France and Britain began developing their own chemical weapons and gas masks.
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On May 7, 1915, less than a year after World War I (1914-18) erupted across Europe, a German U-boat torpedoed and sank the RMS Lusitania, a British ocean liner en route from New York to Liverpool, England.
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The United States presidential election of 1916 was the 33rd quadrennial presidential election, held on Tuesday, November 7, 1916.
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The Zimmermann Note was a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico in the prior event of the United States entering World War I against Germany.
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U.S. Entry into World War I, 1917. On April 2, 1917, President Woodrow Wilson went before a joint session of Congress to request a declaration of war against Germany. ... The United States later declared war on German ally Austria-Hungary on December 7, 1917.
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On Nov. 7, 1917, Russia’s Bolshevik Revolution took place as forces led by Vladimir Ilyich Lenin overthrew the provisional government of Alexander Kerensky.
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Germany signed an armistice (an agreement for peace and no more fighting) that had been prepared by Britain and France. At the start of 1918, Germany was in a strong position and expected to win the war.
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World War I officially ended with the signing of the Treaty of Versailles on June 28, 1919. Negotiated among the Allied powers with little participation by Germany, its 15 parts and 440 articles reassigned German boundaries and assigned liability for reparations.
