The two types of sources are maps and artifacts
Answer:I think five colonists
Explanation:
Polk believed that it was the destiny of the U.S. to expand
entire continent as part of its Manifest Destiny. He believed that the war with
Mexico fitted well with that vision.
When the U.S. won it took over several territories from the Mexicans.
The farm land of the Fertile Crescent that made agriculture easy for the people.