Here are the events matched with their descriptions:
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A deadly German U-boat attack sparking outrage in the United States.
Response: Sinking of the RMS Lusitania -
Germany offered to help Mexico regain land that was in the United States.
Response: The Zimmerman Telegram -
Wilson's attempt to promote peace and preserve territorial integrity through open discussion.
Response: Moral diplomacy -
Military action which made use of new technologies like machine guns, tanks and poisonous gases leading to a higher death (mortality) rate than any other conflict up to that time in history.
Response: World War I -
Officially ended WWI.
Response: Treaty of Versailles (pronounced - vur-sigh) -
American interference in another nation’s affairs should occur only when the circumstances rose to the level of a moral imperative.
Response: The League of Nations