How did us production change for world war 2?

“Powerful enemies must be out-fought and out-produced,” President Franklin Roosevelt told Congress and his countrymen less than a month after Pearl Harbor. “It is not enough to turn out just a few more planes, a few more tanks, a few more guns, a few more ships than can be turned out by our enemies,” he said. “We must out-produce them overwhelmingly, so that there can be no question of our ability to provide a crushing superiority of equipment in any theatre of the world war.”