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What two german actions caused the united states to enter world war i?

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Sent a telegraph to Zimmerman proposing a Mexico-Germany alliance in the event of war between Germany and the U.S., and sunk 2 un-armed passenger ships after pledging not to
User K J
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the Zimmermann note, submarine warfare

Goodluck!!Gang gang,Woot woot!!

User Kinjal Gohil
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