Why did most Americans move west after the Civil War?

Which 2 european countries controlled the most land in africa

What strategy is this ad using to get people to support its product? o o lt claims that everyone agrees that these basketballs are the best it details how these basketballs will improve performance. it provides stats about players who use these basketballs. it uses a celebrity to endorse these basketballs.

What is the name for the main idea behind the settling of western lands by americans in the early-1800s?