After settlers moved onto native american land, where were the native americans forced to live?

At first, the United States government had just one policy to deal with the Indians. It was brutal. Whenever white men wanted Indian land, the tribes were pushed farther west. If the Indians protested, or tried to defend their land, they were destroyed with crushing force.

By the middle eighteen-hundreds, almost all the eastern Indians had been moved west of the Mississippi River. They were given land in Indian territory in what is now the state of Oklahoma. The government described these Indians as "civilized." This meant they were too weak to cause more trouble. Many agreed to follow the ways of the white men.

the crusaders are identified in the painting;

c. by the red crosses on their backs

where is the picture?