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Archduke Franz Ferdinand, the heir to Austro-Hungarian throne and his wife, the Duchess of Hohenberg were killed by Gavrilo Princip just two hours after escaping an assassin's bomb.
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One month after the assassination of Archduke Franz Ferdinand and his wife Sophie, the Austro-Hungarian government declares war on Serbia.
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The Gallipoli campaign captured Constantinople and ultimately knocked Ottoman Turkey out of the war.
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Italy declared war against Austria-Hungary once The Treaty of London was signed.
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the battle between Germany and Verdun began, with a massive artillery bombardment and a advance by troops of the German Fifth Army under Crown Prince Wilhelm
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The Naval Battle of Jutland took place between the British Royal Navy's Grand Fleet and the German Imperial Navy's High Seas Fleet.
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After 14 British divisions attacked they were unable to keep up with the barrage that was supposed to take them through to the German trenches.
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President Woodrow Wilson declared war on Germany. When war was declared a response to the submarine war that Germany had been waging on its enemies.
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The first American combat forces arrived in France at the port of Saint-Nazaire. The American Expeditionary Forces were welcomed by the French that saw them as a symbol of hope and relief.
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Russia signed an armistice with Germany in Brest-Litovsk. The armistice was signed between the Russian Republic and the Central Powers
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President Woodrow Wilson declared his "Fourteen Points" outlining the requirements for peace to the U.S. Congress
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Russia signed the Treaty of Brest-Litovsk with Germany that marked Russia's withdrawal from World War I, forcing them to cede large territories to Germany and the other Central Powers.
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The conference was made to establish the terms of the peace after World War I.
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The treaty was signed by Germany and the Allied and associated powers. The treaty signing took place in the Hall of Mirrors at the Palace of Versailles.
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The treaty was signed on June 28, 1919 and then went into effect on January 20, 1920. The treaty gifted some German territories to neighbouring countries and placed other German territories under international supervision.