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the trigger
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 -
declared
President Woodrow Wilson declared that the United States would remain 'impartial in thought as well as in action. ' -
U-boat
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. -
re-elect
American voters re-elect President Woodrow Wilson who had campaigned on the slogan, "He kept us out of war." -
british
British naval intelligence intercepted and decrypted a telegram sent by German Foreign Minister Arthur Zimmerman to the German Ambassador in Mexico City. -
passed the declaration
Congress passed the Declaration of War went into war to protect shipping and the freedeom of trade while in international waters -
landed in france
The first American troops land in France. -
The Sedition Act
The Sedition Act of 1918 curtailed the free speech rights of U.S. citizens during time of war -
end of the war
The Allied powers signed a ceasefire agreement with Germany at Compiégne, France -
signed
The Versailles Peace Treaty, signed on June 28, 1919, officially ended World War I.