Question

Explain why the United States

cannot ignore Germany's use of
submarines to attack merchant
(commerce) ships, even when
they are not American ships.

Answer 1

On May 4, 1916, Germany responds to a demand by U.S. President Woodrow Wilson by agreeing to limit its submarine warfare in order to avert a diplomatic break with the United States. ... Although the ship did not sink, 50 people were killed, and many more injured, including several Americans.