Question

Besides land, what did the United States gain from expansion?

Answer 1

The United States gained resources and gold which they reaped from the land. Also, California was controlled by Mexico for many years until the Mexican-American war, when America won the land. This vital victory gave them hoards of gold, oil, and coal, all useful and valuable materials. :)

Answer 2

Rights as new people they gained a lot of freedom as well to do what they needed and where along with building there economy