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Why did German submarine warfare upset the United States?

Germany refused to buy U boats from the United States
Germany attacked neutral shipping, causing American loss of life.
The German blockade of Great Britain was ineffective.

User Whispers
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2 Answers

4 votes

Answer:

Germany attacked neutral shipping, causing American loss of life.

Step-by-step explanation:

User Jeudyx
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Answer:

Germany attacked the neutral shipping , causing American loss of life.

User Reesjones
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