" At least on paper, Congress had dramatically enlarged federal power and black rights. In December 1866 only about 0.5 percent of black adult males could vote. In December 1867 the figure rose to 80.5 percent, with the entire increase coming in the old Confederacy. "

― Richard White , The Republic for Which It Stands: The United States during Reconstruction and the Gilded Age, 1865-1896