Which of these was a factor in the United States entrance in World War I? A) the invasion of Poland B) Japan's invasion of China C) The Axis threat to the Panama Canal D) German unrestricted submarine warfare

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History

Milagros Rowland

25 March, 00:05

Which of these was a factor in the United States entrance in World War I? A) the invasion of Poland B) Japan's invasion of China C) The Axis threat to the Panama Canal D) German unrestricted submarine warfare

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Paige Williams · Answer 1

It was only German unrestricted submarine warfare that directly contributed to American involvement in the war. It would take the bombing of Peal Harbor to completely bring the US into the war.