Which of the three major causes of U. S. entry into WWI do you think had the greatest impact? Justify your position.
I

The entry of the United States was the turning point of the war, because it made the eventual defeat of Germany possible. It had been foreseen in 1916 that if the United States went to war, the Allies military effort again Germany would be upheld by U.S. supplies and by enormous extensions of credit.

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.