During WWII, the United States massively increased its industrial output. This was an anomaly when compared to other similar countries (mainly Western Europe and Japan) which did not grow in the same way.
There are many reasons why the United States achieved this growth. President Roosevelt was particularly dedicated to increasing industrial production. He exempted some workers in wartime industries from the draft. This allowed factories to have enough workers to continue in operation. He also encouraged the participation of women in areas that were traditionally male dominated. Finally, he focused on industries that were needed during the war, such as aluminum and aircraft.
the way United States maximize industrial output during the war was: It exempted some workers in wartime industries from the draft.
During the war, many men were obligated by law to contribute their service to the country. Those that are not physically capable to be a soldier tend to be exempted and required to contribute to other sectors of the war. One of them was as workers in war-related industries.
The Qing officials were worried about internal uprisings such as the Taiping Uprising which arose as the peasants considered the origins of the dynasty as foreign. China also experienced explosive population growth which posed a threat as it was not industrially revolutionized to meet the needs of this population.