What effect do immigrants have on the United States? How do you know?

what year are you talking about

Explanation:

I need to know what year like the 1800s through early 1900s when the old immigrants and the new immigrants, or do you mean today?

Immigrants adopted parts of American culture, and Americans adopted parts of immigrants cultures. I know because we celabrate "cinco de mayo" and that is mexican culture we also celebrate christmas which is part of german culture.

b) the confederacy had to pay all union war expenses.

probally   a few days after there called