Answer:
The government was treating the Indians very brutally and forcing them to leave their land by crushing force.
Explanation:
In the middle of 1800, all the Indians in eastern moved to the Mississippi River which is now known as Oklahoma and the US government named them as “Civilized” which meant they are weak and powerless to cause trouble. So, many of the Indians agreed to follow the white men that are their policies.
But the western grasslands’ Indians were different and decided not to resist their policies and denied to give up their lifestyle. In 1862, there were Indians who were still living peacefully with the whites, suddenly turned against them as they were getting paid less for which they were not able to afford food and remained hunger. As a result, their hunger turned into anger and a local Indian chief with his men declared a war.