The U.S. struggles against the Communist in Vietnam

1a) Were the armies finely balanced or was the balance strongly weighted to one side or the other?
They were strongly weighted towards the U.S.

1b) Which quality was most important in determining who won the war? Was one feature so important that being ahead in that area meant that other advantages or disadvantages did not matter? Yes because having good effective war tactics and motivated men is all you need to win a war it is not the gun that makes a person scary it is the shooter.