By 1945, the United States had built two-thirds of all ships afloat and was making half of all manufactured goods in the world, including nearly half of all armaments. The enemy was crushed by logistical brilliance, firepower, mobility, mechanical aptitude, and an economic juggernaut that produced much, much more of nearly everything than Germany could—bombers, bombs, fighters, transport planes, mortars, machine guns, trucks—yet the war absorbed barely one-third of the American gross domestic product, a smaller proportion than that of any major belligerent.
