The main reason why the US sent troops to overthrow Afghanistan's government in 2001 was because the nation was harboring members of the terrorist group al-Qaeda, which was responsible for the 9/11 attacks.
a. the appeal of Christianity among all social classes of Europe.
At first the Native American's were fine to share their land with the colonist, but it be came more clear that the colonist were starting to push the Native Americans out of their land. So how do the Native Americans think about Manifest Destiny they see it as invasive and intrusive movement that was being done by the colonist and were more than willing to go to war for their land.
The indian Wars and the building of Transcontinental Railroad