Why did America enter World War I? Britain convinced them of their need to join the Triple Entente. Germany declared a policy of unlimited submarine warfare and sank a ship with 139 Americans on board.

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asked Jul 19, 2018 229k views

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Why did America enter World War I? Britain convinced them of their need to join the Triple Entente. Germany declared a policy of unlimited submarine warfare and sank a ship with 139 Americans on board. Germany was threatening to bomb America. Congress saw that it "was the right time to jump in."