What did congress declare all southern states must do in order to be allowed back into the union?

The inventor cocreated the film fred arts sneeze which was one of the first american movies

List two inventions that were invented in the united states before the american civil war

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