The document discusses several aspects of immigration and nationalism in the United States between 1830-1860. It describes the Indian Removal Act which forced Native American tribes west of the Mississippi. It also discusses the concepts of Manifest Destiny and expansionism. The Know Nothing Party emerged opposing immigration, especially Catholic immigration. The Potato Famine led to a surge of Irish immigrants in the 1840s-1850s who worked on infrastructure projects. Chinese and German immigration also increased during this period.