Why did slavery shift from indians to africans?

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.

this act gave the federal government the power to relocate any native in the east to territory west of the mississippi river.