What does lincoln think the purpose of the civil war is?

On March 4, 1865, Abraham Lincoln took the oath of office for the second time. The setting itself reflected how much had changed in the past four years. When Lincoln delivered his First Inaugural Address, the new Capitol dome, which replaced the original wooden one, was only half-complete. Now the Statue of Freedom crowned the finished edifice, symbolizing the reconstitution of the nation on the basis of universal liberty. For the first time in American history, companies of black soldiers marched in the inaugural parade.