The greatest advantage of United States in world war II was its
ability to rapidly transition from peace to war and mass produce weapons
and war equipment at a colossal scale. This was so effective that the
USA was able to make up for time lost, and the nation was able to
effectively train the necessary forces and then exert a massive material
superiority.
America was able to build up an air force that came
to dominate the skies, and with this air superiority, it was all but
over for the enemy, the Axis forces.
