sentences:  He was concerned that such a move would prompt the British to do the same, leading to an arms race in which the Americans would be at a disadvantage, and that it would promote discontent among those who remained enslaved.During the war, some 5,000 African-Americans served in a Continental Army that was more integrated than any American force before the Vietnam War, and another 1,000 served on American warships.They represented less than three percent of all American forces mobilized, though in 1778 they provided between six and thirteen percent of the Continental Army.