Final answer:
Immigrants came to the United States in this era due to the prospect of free education.
Step-by-step explanation:
One reason that many immigrants came to the United States in this era, as discussed in the unit, was the prospect of free education. Immigrants saw America as a land of opportunity where they could provide better futures for their children through education. This motivated many immigrants to come to the United States, including those who later joined the Union Army during the Civil War.
Learn more about Reasons for immigration in the United States