During World War II, the U.S. rapidly mobilized its economy for war production, transforming various industries to supply the military with vast amounts of arms and equipment. Millions of Americans, including over 6 million women, joined the workforce, with significant government investment in factories and wartime production coordination. The war effort also stimulated a cultural shift and imposed rationing measures, all contributing to a robust homefront morale and economic growth despite the national debt increasing significantly during this period.