Why was Wang Ben able to conquer Daliang—a world-class royal city that had taken twenty-one years to build? Wasn't it precisely because Daliang was flooded? As long as the State of Wei possessed a powerful navy and controlled the Yellow River, it would be exceptionally difficult for the Qin army to capture Daliang.
In other words, as long as the Yellow River remained in the hands of the State of Wei, the Qin army would find it hard to threaten Daliang.
Of course, if the State of Zhao also fell, then defending the natural barrier of the Yellow River would become entirely meaningless.
Chapter 482