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Austrians focus their anger at Serbia, because they assassinated Archduke Franz Ferdinand, heir to the Austrian throne. Austrian is a reliance of the US -
The United States declares its neutrality. -
Off the coast of Ireland, a German U-Boat torpedoes the British passenger ship Lusitania. In 18 minutes, it sinks, drowning 1,201 people, including 128 Americans. Following that, President Woodrow Wilson dispatches four diplomatic objections to Germany. -
American voters re-elect President Woodrow Wilson who had campaigned on the slogan, "He kept us out of war." -
The British intercept a telegram sent from the German Foreign Office to the German embassies in Washington, D.C. and Mexico City by Alfred Zimmermann. Its message discusses preparations for a German-Mexican collaboration against the United States. The Zimmermann telegram is relayed by the British to the Americans and subsequently made public, sparking outrage among interventionists in the United States, such as former President Teddy Roosevelt, who urge American military engagement in the war -
The United States of America declares war on Germany. -
The first American troops land in France. -
The Sedition Act of 1918 limited Americans' free speech rights during the war. The act, passed on May 16, 1918, as an amendment to Title I of the Espionage Act of 1917, provides for additional and increased restrictions on speech. -
The Allied powers signed a cease-fire agreement with Germany in Compiégne, France, thereby ending World War I. -
The peace treaty that ended World War I was signed in the Hall of Mirrors at Versailles by dignitaries.