December 11, 2000 In the decades following the Civil War, the United States emerged as an industrial giant. Old industries expanded and many new ones, including petroleum refining, steel manufacturing, and electrical power, emerged. Railroads expanded significantly, bringing even remote parts of the country into a national market economy. America was the ideal place. In the late 1800s, people in many parts of the world decided to leave their homes and immigrate to the United States. Fleeing crop failure, a shortage in land, and employment, ri ....