How did the division of the empire contribute to Rome's inability to stop invading tribes ?

By the end of the 1800s, there was a change in the nature of the immigrants coming to the united states. immigration from northern europe—england, ireland, germany, and scandinavia—declined, while immigration from italy, russia, and austria-hungary grew. in fact, between 1900 and 1910, more than three-fourths of all immigrants came from these three countries. unfortunately, these countries were far removed england, the home of our founders, and the immigrants who came from them had a hard time adjusting to life in their new country.

What issue led to the split in the democratic-republican party in the late 1850s

Who were some of the most important scientist in there and shipments of the revolution