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When the Lusitania sank, it caused a huge uproar during the war because 128 American citizens were killed. America was angry with Germany because they had agreed to not attack anymore American vessels. This event lead to unauthorized submarine warfare to stop for 2 years.
http://www.youtube.com/watch?v=RCrzaC4aLPg -
On August 19th 1915 the Arabic sunk and 3 Americans were killed. This added on to the growing frustration of America before they entered the war.
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The Zimmerman telegram was a dipolmatic proposal from Germany to Mexico to convince them to start war against the United states.
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On Febuary 26th 1917, President Wilson arms merchant ships with personnel and equipment.
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On April 2nd 1917, President Wilson decided to outline his case for war to Congress.
http://www.firstworldwar.com/source/armisticeterms.htm -
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It was the second day of the great German offensive comprising the Third Battle of the Aisne.
American troops lead by Major-General Robert Lee Bullard, captured the village of Cantigny which had been under German rule.
http://www.firstworldwar.com/battles/cantigny.htm
The French aided the Americans in their attack by providing supplies and weapons. -
This was the last German Spring Offensive on the Western Front. The German attack failed when the French interfered with a counter attack. This defeat started a numerous amount of victories for the Allies. This was considered the beginning of the end of the Great War.
http://en.wikipedia.org/wiki/Second_Battle_of_the_Marne
http://www.youtube.com/watch?v=SPBHjE6MOPI -
On November 11th, World War 1 officially ended.
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The Allies terms were presented to Germany. Germany was stunned by the terms and protested but gave in and signed the demands. President Wilson celebrated by giving the Thanksgiving Address at the end of the month.
http://www.firstworldwar.com/source/armisticeterms.htm
http://www.youtube.com/watch?v=OWbXhpcys5I -
After the war, the countries decided to ratify the Treaty of Versaille to restore peace.
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On the 16th of January in 1920, the League of Nations had their first metting. Their purpose was to try to resolve future conflicts peacefully.
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http://history.state.gov/milestones/1914-1920/WWI
http://en.wikipedia.org/wiki/American_entry_into_World_War_I
http://en.wikipedia.org/wiki/Zimmermann_Telegram
http://en.wikipedia.org/wiki/SS_Arabic_%281902%29
http://www.history.com/this-day-in-history/germany-resumes-unrestricted-submarine-warfare
http://en.wikipedia.org/wiki/World_War_I
http://en.wikipedia.org/wiki/RMS_Lusitania -
On April 20th 1946, the League of Nations called a quits and dissolved. Later they would be replaced by the UN.
