US manufacturing was dominant through the twenties and thirties. it really shone in the 40s under a war time economy. It was a sleeping giant and the world knew it. Pennsylvania outputted more steel than Japan and Germany combined. Audacious goals set by President Roosevelt were mocked by Hitler as audacious Hollywood goals. The US easily surpassed these goals.
It was an amazing display of competence. The only other countries to match the intensity of growth would the USSR during the five year plan and the PRC during the eighties. But both of them were starting from an agricultural economy. The USSR never reached the American manufacturing peak and China has surpassed.
The unprecendent dominance is due in no small part because the rivals needed to rebuild. But under representing America’s position with regards to labor, capital, resources and state coordinated mobilization would be a serious error.