The U.S. government adopted a policy of pacification and confinement of Native Americans to reservations .
Due to their encroachment and competition for scarce resources , interaction between Native American groups and the Euro - American settlers became increasingly tense .
The U.S. government adopted a policy of pacification and confinement of Native American   to reservations .
Due to their encroachment and competition for scarce resources , interaction between Native American groups and the Euro - American settlers became increasingly tense .