One way the “new immigrants” of the late 1800s differed from the “old immigrants” of the early 1800s was that the “new immigrants”

Came from Southern and Eastern Europe

Explanation:

The new immigrants in the late 1800s were coming from Southern and Eastern Europe to find a better way of living. They left their homeland to get away from poverty, political persecution, and lack of economic opportunity that pushed the new immigrants to move to America. These people were from Italy, Russia, and Austria-Hungary.

The old immigrants of the early 1800s came from Northern and Western Europe including Ireland, Great Britain, and Scandinavia.

the roman army grew in size and became dominant in the mediterranean region.