Question

What led to the American involvement in the Great War?

Answer 1

The Germans torpedoed several passenger ships, repaying the assistance in the American Revolution by the French 

Answer 2

U.S. declared war on April 6th, 1917, the U.S. had desperately tried to stay neutral, but ties to Britain, propaganda, the sinking of ships by German U-boats, and a German attempt in the Zimmermann Note to get Mexico to declare war on the U.S. pushed the U.S. to get involved.