When does population increase

How did the voting rights act and the 15th amendment combine to improve individual rights for african americans

Which action by the us war department angered chief red cloud to the point that he refused to sign the treaty of fort laramie ? a) the killing of buffalo by the united states troops b) the appointment of troops to the powder river basin c) the burning of parts of the powder river basin d) the murder of chief red cloud’s wife

Brainliesttt !me : ) what was the result of indian independence?