The role of Dongping County as the western barrier of Le'an Prefecture had been maximized.
As for the last city, Wuyan City, it is located behind Xichang and Shouzhang, on the border of Dongping and Le'an Prefectures, and does not directly border the range covered by the Chu army.
The Xu army has set up a major stronghold here, obviously determined to use this city as the second line of defense after Xichang and Shouzhang.
No matter which frontline city falls, if the Chu army wants to push forward and penetrate into Le'an, they must face Wuyan City blocking their way.
With this city in place, there is an additional buffer zone.
This gives Xu State in the rear more time and energy to regroup a large army and continue resisting.
Creating impregnable defenses and resisting at every step—such is the strategy Xu State has been implementing in the face of Great Chu's Northern Expedition.
They know they can't win against the Chu army on the open battlefield.
