In what ways did this approach perpetuate or continue the history of oppression of First Nations and African Americans in the post-Civil War period?

When the United States established an overseas empire through both territorial acquisition and commercial domination, one of the prevailing reasons cited by government authorities for the expansion was the so-called “white man’s burden” to bring supposedly “inferior” peoples under the dominion of people of European ancestry.

In what ways did this approach perpetuate or continue the history of oppression of First Nations and African Americans in the post-Civil War period?

Please analyze at least three events in U.S. foreign affairs in 1880-1920 where U.S. government motivations and policies were clearly guided by these racial considerations. 500 words double spaced one page and a half