What single event set in motion a chain of events that resulted in the start of the First World War?
Briefly explain the part each of the following played in keeping the United States neutral during the first years of the war:
Isolationism:
Divided sympathies:
Woodrow Wilson:
Although the United States officially remained neutral, it did not remain completely impartial. Which side—the Allies or the Central Powers—did the United States help? Why? In what ways did it help?