What was the United States involvement in World War one?

Answer by  sususu (866)

Several factors led the U. S. to get involved: the sinking of the Lusitania, the interception of the Zimmerman telegram, and President Wilson's re-election.

Answer by  chuvixa8182 (266)

German submarines attacked a ship called the Lusitania which was bound for Britain from New York. Many people believe the U. S. would not have become involved in WWI if not for this. The U. S. officially entered World War I in April of 1917.