Answer :
Answer:
World War 1
Explanation:
Germany's resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson's decision to lead the United States into World War I.
In 1917, the U.S. joined WW1. This was triggered by Germany’s sinking of many American merchant ships near the British Isles. This is what prompted the United States to join World War 1.