Because they were stronger united than they were divided, and being weaker they were susceptible to attacks
I'm assuming they both where a ancient native american cultures but both have industrious and neither had written records of their cultures.
Hope This Helps?
Answer:
Grand Cepntral is in New York City
The conflict arose because the US citizens wanted to spread towards the western shores and pushed the Natives out of their land and forced them to migrate. The conflict didn't get resolved since there was war and fighting because many didn't want to go, but in the end they were placed in reservations.