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Did the United States really enter World War I out of self-defense?
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Selected thesis
The United States entered World War I to defend itself from the Central Powers.
Pros
Cons
Pro claim 1
The US entered the war in response to German submarine attacks on US ships.
Pro claim 2
The Zimmermann Telegram threatened the US with military aggression.
Con claim 1
Entering the war was a politically popular move.
Con claim 2
The US entered the war to protect its economic investment in the Allied powers.