Question

How did the United States manage to expand its territory across the continent?

Answer 1

The U.S. expanded its territory largely through military conquest. ... This stated that it was obvious (manifest) that the United States was meant to own all the land below Canada between the the Atlantic and the Pacific oceans.

Answer 2

Hello There!

Manifest Destiny. Many politicians got Americans to believe that it was their destiny to span the continent and claim all the land. This even was also know as Westward Expansion, and refers to the time period where Americans migrated west for a new life or economic pursuit.