 Complete the following phrase:  An important river in American history, the Rappahannock was long an area of occupation by indigenous peoples. During the colonial era, early settlements in the Virginia Colony were formed along the river. It was at the center of a major theater of battle in the American Civil War, where tens of thousands of troops fought against each other. Some 10,000 African-American slaves escaped across the river to Union lines and freedom, after the first 