The American manufacturing process was the greatest in the world. You may recall we built Liberty ships in under a week at a time. Automobile manufacturers were quickly converted to building tanks and churned them out like new sedans. Nearly all of the raw materials were obtained and processed internally. Our manufacturing centers were in no threat of bombing. Civilian goods manufacturing was severely curtailed to shift over to the war effort.
Wasn't this during a time when a large percentage of manufacturing jobs were union, and we had tariffs on imports? Too bad neocons don't learn from history, eh?