Question

Which policy did the United States adopt when World War I first broke out in Europe?

Answer 1

The prevailing thought was that the US adopted the policy of Isolationism. However, it's more likely they adopted instead the policy of non-intervention, where it chose not to take a side, but actively mediate for peace. That did not last as the war went on, and they entered the war on 1917, taking the side of the Allies.

Answer 2

isolationism .............................................