Probably because they had massive manpower, montecezuma dead, and better weaponry
Many immigrants came to America<span> seeking greater economic opportunity, while some, such as the Pilgrims in the early 1600s, arrived in search of religious freedom.</span>
The technology that is being referred above is what we call the Bessemer Steel Process. In this process, metals are being formed through elimination of impurities from the iron. This has been known as an non-expensive way of mass producing steel for building. Hope this helps.
The U.S. government had little or no influence on business and industry.<span>
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DMZ line Explanation: Demilitarized Zone
Kim Jong Un North Korea Leader
Moon Jae-in South Korea Leader