American history is often described in terms of Europeans entering a nearly empty wilderness. For centuries, though, most of the newcomers were African and the land was not empty, but filled with millions of indigenous people. Much of the great encounter between the two separate halves of the world thus was less a meeting of Europe and America than a meeting of Africans and Indians--a relationship forged both in the cage of slavery and in the uprisings against it. Largely conducted out of sight of Europeans, the complex interplay between red and black is a hidden history that researchers are only now beginning to unravel.