What was the purpose of U. S. government establishing Indian schools?

What was the purpose of U.S. government establishing Indian schools is because they were established in the United States during the mid 17th through the early-21st centuries with a primary objective of "civilizing" or assimilating Native American children and youth into Euro-American culture.

Explanation:

Here's more information about it.

https://en.m.wikipedia.org/wiki/American_Indian_boarding_schools

c. the dred scott v. sandford case,

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.