why did the us enter ww1 apush
The German's naval policy was the major reason why the United States declared war on Germany. The sinking of the Lusitania was the biggest influence of American in WWI. It was so much of an influence that it was said without the sinking of the Lusitania, the United States most likely would not of entered the war.t was the assassination of Archduke Franz Firdinand that started World War I. The Americans were brought into WWI for that fact that the Germans sank some American ships, and â¦ that they wanted to protect there European Investments.