How would the spirit of Manifest Destiny guide the destiny of hundreds of Native American cultures on the Great Plain and West of the Great Plains? Write an essay will describe the impact of Westward Expansion upon the chosen Native culture of the Great Plains and western tribes. What Federal policies governed treatment of Native groups, and what issues gave rise to the Great Plain Wars? Make sure that ample historical records exist for the chosen tribe. Some tribes are not well-documented in the existing historical record.