Answer:
American Indians who lived in the West tried to prevent settlers from moving onto their territory.
Step-by-step explanation:
American Indians previously occupied the west and viewed settlers as invaders. However, resisting the encroachment of the settlers proved very difficult. The American Indians were forced onto reservations and the American settlers began to systematically kill the buffalo herds to try to weaken the American Indian position. The settlers broke many of the treaties the US government had established with the American Indians in the West, further taking their land. Many heroic American Indians like Sitting Bull and Crazy Horse made courageous efforts to save their people but unfortunately many communities were pressured onto reservations or assimilated and suffered violence.