World War I

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Why did the US enter WWI and what effect did its entry have?

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Ashley Kannan eNotes educator | Certified Educator

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The stated reason for the entry of the United States into the First World War was to protect democratic nations from the threat of anti- democratic ones.  The perceived attack from Germany helped to justify the need for entry into the war.  On another level, others argue that the United States was waiting for a reason to enter the conflict, that there is enough historical research to indicate that the Lusitania incident could have been preempted a bit better than it was and that America knew of sentiments percolating before it.  Regardless, the United States recognized that while Europe was mired in a brutal war for...

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The u.s.a entered because of the submarine warfare taking place, and its position was enforced by the sinking of the Lusitania which led to people protesting for war. The usa joining ended the stalemate in Europe because unlike the other countries the USA still had a strong army that hadn't been deterred by the years of fighting and their weapon helped the allies win ww1.

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