The correct answer to this open question is the following.
The US fulfilled its providential fate by expanding, conquering, settling, and developing the West in that the federal government made every single effort it had in its hand to remove the Native American Indian tribes in order to facilitate the settling of white Americans to work the lands and make it productive.
This represented a good way to fulfill the United States' idea of Manifested Destiny, the belief system that the United States was blessed to expand and gain new territories. The Manifest Destiny was the best way the US government found to justify the annexation of the former Mexican territories such as California, New Mexico, Arizona, and Texas. Or other territories such as Oregon County.
The Westward Expansion devastated the Native American Indians. The expansion removed the Indians from their original territories. White settlers started to occupy their territories under the protection of new legislation passed in the United States Congress.
Federal government legislation such as the Homestead Act, Dawes Act, and Reservation system negatively impacted Native American tribes.
