I do believe the answer to this question is both Egypt and Mesopotamia.
India was an excellent trading spot. Many merchants from different countries came and traded with Britain, which in turn brought Britain more money.
Immigration was certainly a key factor in the growth of America's economy . The Industrial Revolution came with massive technological developments, and the chance to exponentially improve the production rate of factories. However, to operate these emerging industries it would take a tremendous amount of laborers. American citizens working alone, weren't going to be enough. In other words, the peak of immigration influx allowed the U.S. to take full advantage of the possibility at the right time.
Hope this helps!
Answer:
present day Utah, Nevada, and most of Arizona