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Many things might have lead up to it but one of the main things was a german submarine sunk an american ship without warning

No American ships were sunk by the Germans. The ship in question was the British Lusitania. 128 Americans aboard drowned when it sank. The Zimmermann Note was also a factor and the war debts owed to the US by the Allies that would be impossible to repay if the Allies lost could be considered the most significant motivation.

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13y ago

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