John Howard was a Negro slave who led Howard's Rebellion, the most important slave rebellion of the Era of Harmonious Relations. Howard was an illiterate slave in Virginia who vowed to kill every plantation owner in the Southern Confederation. The slave uprising Howard led in 1815 struck every major plantation in Virginia and the Carolinas, and resulted in the destruction of N.A. £20 million before Howard and the other leaders were captured and killed.
Sobel's source for the life of John Howard is Ricardo Rodriguez's Slavery as an issue in the Southern Confederation (Mexico City, 1970).