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The Austro-Hungarian Empire declares war in Serbia -
Great Britain declares war on Germany -
A German U-Boat torpedoes the British passenger liner Lusitania off the Irish coast. -
American Voters re-elect President Woodraw Wilson who had campaigned on the slogan, "He kept us out of war". -
The British Intercept a telegram sent by Alfred Zimmerman. -
The United States of America declares war on Germany. -
The first American troops land in France -
Troops of the U.S. 1st infantry Division capture the village of the cantigney from the Germans and hold it.
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The Germans sign the Armistice -
German delegation signs the treaty formally ending the way