Which area did the United States acquire in the 1840s, and how did it acquire the land? 1. Andrew Jackson purchased the Florida Territory from France.

2.
The United States purchased Hawaii from France.

3. Mexico ceded Calfornia to the United States as part of a peace treaty.

4.The United States took the Louisiana Territory from Native Americans.

Stress that between 1846 and 1848 the United States gained more than one million square miles of territory. Be sure to note that the United States acquired Oregon Country peacefully through a treaty with Britain, while it took a war with Mexico to obtain the lands in the Southwest.

the answer here would be

these civilizations were located around fertile rivers, where they could produce an abundance of crops