Immigration to the United States After 1815

Describe immigrants to the United States in the 18th-19th centuries.

Immigration to the United States increased dramatically after 1815 and continued into the mid-19th century. Describe the major immigrant groups of that time, their lives in America, and the reaction from those already in the country. What were the 3 main reasons why people immigrated to the United States in the 1800s? What best describes immigration to the United States in those years?