The unprecedented levels of production in domestic manufacturing and commercial agriculture during this period greatly strengthened the American economy and reduced dependence on imports. The Industrial Revolution resulted in greater wealth and a larger population in Europe as well as in the United States.
I believe the answer is New York City but I may be wrong.
Ooh, a wwii question! my favorite!
Forces may be unstoppable on their own, but when they band together, that and excellent advances in militaristic technology, such as the famous Russian T-34, the American B-29 Superfortress, and the British Fairey Swordfish, present a formidable force.