ABSTRACT
As the United States entered the nineteenthcentury, it continued to grow both in pop-ulation and in area. Americans migrated west and explore the young nation’s seemingly endless frontier, even as people from other countries proceeded to immigrate to the United States in search of freedom, prosperity, or a chance for a new life. Both immigration and migration occurred in waves, dictated often by war, territorial holdings, or the economy. As people moved both within and to the United States, new cities sprang up and existing ones grew substantially. Regardless of reasons for immigration or migration, job opportunities were an important consideration. The development and emergence of industry in the United States profoundly affected where and which cities grew, and what people in those cities did to earn a living.
