President Woodrow Wilson went before a joint session of Congress to request a declaration of war against Germany. ... 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. The entry of the United States was the turning point of the war, because it made the eventual defeat of Germany possible.
The entry of the United States was the turning point of the war, because it made the eventual defeat of Germany possible. It had been foreseen in 1916 that if the United States went to war, the Allies' military effort against Germany would be upheld by U.S.
