The Shang empire consisted of city-states, with much war between the various cities but particularly against the non-urbanized, agricultural populations in the rural areas. The capital cities shifted as often as power changed hands. The Shang dynasty perfected the wheel and used chariots in warfare. | The Shang empire consisted of city-states, with much war between the various cities but particularly against the non-urbanized, agricultural populations in the rural areas. The capital cities shifted as often as power changed hands. The Shang dynasty perfected the wheel and used chariots in warfare. |