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during an official visit to the Bosnian capital of Sarajevo on June 28, 1914. The killings of Archduke Franz Ferdinand and him wife sparked a chain of events that led to the outbreak of World War I by early August
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President Woodrow Wilson declared that the United States would remain 'impartial in thought as well as in action. '
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the German submarine U-boat 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.
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American voters re-elect President Woodrow Wilson who had campaigned on the slogan, "He kept us out of war."
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British naval intelligence intercepted and decrypted a telegram sent by German Foreign Minister Arthur Zimmerman to the German Ambassador in Mexico City.
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Congress passed the Declaration of War went into war to protect shipping and the freedeom of trade while in international waters
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The first American troops land in France.
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The Sedition Act of 1918 curtailed the free speech rights of U.S. citizens during time of war
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The Allied powers signed a ceasefire agreement with Germany at Compiégne, France
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The Versailles Peace Treaty, signed on June 28, 1919, officially ended World War I.