4. In which of the following ways was the Vietnam War different from previous wars for U. S. soldiers A. The U. S. soldiers had the advantage of knowing their terrain.
b. The enemy employed guerrilla tactics that frustrated the U. S. soldiers.
c. The U. S. soldiers were fighting against the largest army they had ever faced.
d. The enemy had the same number of high-powered weapons as the U. S. military.

The Vietnam War was different than any other war that the United States had fought to that point.The major enemy for the US was more of a guerrilla organization that did not fight traditional battles. This was also different than other US wars because it was not a war to take territory.

Explanation:

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.