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1. Prosperity- War in Europe was good for the U.S., farmers and businesses. Allies bought most of the goods from us-- they also took out billions of dollars worth of loans, which tied the U.S. to the triple entente2. Ethnic Ties- Many Americans related more with the British and French, while the media portrayed Germany and Austria in a negative light, tying us closer to joining the Allies3. German submarine warfare-the Germans knew that their only chance to break the British control of the seas was to use the submarine, which they had perfected-- it was also the only way that they could access the vast American markets, sank Lusitania, killing and outraging many Americans (stopped then started using them again 2 years later)4. Zimmerman note- Germany sent note to Mexico for them to join the war against US to get Texas back-- scared west coast, now that east coast was dealing with german submarines

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