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Period: to
World war 1
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Declaration of neutrality
Britain's entry declaration of war with Germany on 4 August 1914, a general European war - soon to become a world warhttp://www.firstworldwar.com/source/usneutrality.htm -
The Lusitania
In 1915 she was torpedoed and sunk by a German U-boat, causing the deaths of 1,198 passengers and crew http://en.m.wikipedia.org/wiki/RMS_Lusitania -
Sussex pledge made
The Sussex Pledge was a promise made in 1916 during World War I by Germany to the United States prior to the latter's entry into the war. -
Period: to
Zimmermann note
Between 1914 and the spring of 1917, the European nations engaged in a conflict that became known as World War I. While armies moved across the face of Europe, the United States remained neutralhttp://www.archives.gov/education/lessons/zimmermann/ -
Sussex Pledge ended
British waited until February 24 to present the telegram to Woodrow Wilson. -
3 american ships targeted
President Woodrow Wilson went before a joint session of Congress to request a declaration of war against Germany. These boats getting hit were a cause.https://history.state.gov/milestones/1914-1920/wwi -
Declaration of war
A formal declaration of war followed four days later, on 6 April 1917
