Germany's resumption of unrestricted submarines warfare in 1917 was perceived in the United States as?

Answer 1

Germany's resumption of unrestricted submarine warfare in 1917 was perceived in the United States as a direct threat to American lives and commerce. The sinking of civilian ships, including the Lusitania in 1915, heightened anti-German sentiment and increased calls for U.S. intervention in World War I. This aggressive tactic ultimately contributed to the U.S. decision to enter the war, as it was viewed as a violation of international norms and a challenge to American neutrality.