In the early 1800s, why did large numbers of immigrants move to the western frontier?

The Gold Rush was a big motivating factor, many people moved there with the dreams of getting rich, and there was also jobs being made since they were building railroads.

Explanation:

I remember this.

one of the negative side effects were the economic losses the events of september 11th caused. many, many people lost their jobs as a result of a downturn in the economy after the terrorist attacks.

b. sec, foreign relations