Answer: The westward expansion resulted in Native Americans move to another place that they did not like.
Explanation: Native Americans was eventually forced to live on designated reservations. The expansion also had a affect on the bison (Buffalo). They would kill them so they would move out of the way of the trains
Answer:
I believe the answer is the Columbian Exchange.
Explanation:
The last straw that ended the Roman Empire for good were Barbarian groups attacking them and their land.
Anyways here:
He built a network of roads and canals and established a national religion. They built the Great Wall and standardized system of weights and measures. They made the army bigger and forced nobles to move to the capital.