The "frontier" the Crown Prince spoke of was naturally not the Northern Frontier, which the Zheng family had guarded for generations, nor the Western Regions jointly managed by the Duke of the State, and certainly not the Eastern Sea commanded by the General of the Flying Cavalry. It was the Southern Border.
Prince Ruicheng was advanced in years; at most, he had a decade left in him. Yet, the small, unruly nations in the south were constantly testing the borders and stirring up trouble. It was necessary to find a trustworthy person to take over the Southern Border in advance.
It would be best if this person came from Prince Ruicheng Manor, so that the handover would not cause turmoil within the military.
Chapter 126